If mass = 30kg, gravity = 10 N/kg and height is 2m of a car. Calculate the gravitational potential energy.

Answers

Answer 1

Answer:

P.E.=600Nm

Explanation:

m=30kg

g=10m/s²

h=2m

P.E.=?

as we know that

P.E.=mgh

P.E.=30kg×10m/s²×2m

P.E.=600Nm


Related Questions

The power of a machine is 6000 W. This machine is scheduled for design improvements. Engineers have reduced the
time for the output by one half from 15 s to 7.5 s. What work would be required to cut the time in half.
Step #1
Step #2
Step #3​

Answers

Explanation:

Work = power × time

W = (6000 W) (7.5 s)

W = 45,000 J

explain the causes of yaa asantewaa war of 1900​

Answers

Answer: the conflict began when a british representative - Sr. Frederick Mitchell Hodgson sat on the golden stool.

Explanation:

since the stool wasn't a throne, when Yaa Asantewaa found out, he led a rebellion which killed 1000 British and allied African soldiers and 2,000 Ashanti.      

good luck with your assignment :)

What is the name of the change in state by which some more energetic molecules in a liquid leave the surface, leaving the rest of the liquid slightly cooler.

Answers

Answer:

evaporation

Explanation:

vapor is having higher temperature (also energy) that the liquid it left behind.

that's why the water vapor leave the surface of water which can only have a maximum temperature as 100°C

Is a 5kg ball is rolling to the right and has a velocity of 4 m/s what is the momentum of the ball

Answers

Answer:

∆p = 20 kg * m/s

Explanation:

The change in momentum is the mass of the body multiplied by the change in its velocity.

In formula form ∆p = m * ( ∆v ).

with m = 5 kg and ∆v = 4 m/s

∆p = 5 kg * 4 m/s

∆p = 20 kg * m/s

A train is moving west with an initial velocity of 20m/s accelerates at 4m/s for 10 seconds during this time the train moves a distance ​

Answers

Answer:

400m

Explanation:

From Newton's law of motion;

S = ut + 1/2 at2

Where U is initial velocity

a is acceleration

t is velocity hence;

S is distance covered

S = 20×10 + 1/2 × 4×(10)^2

= 200 + 200 = 400m

A student with a mass of 66.0 kg climbs a staircase in 44.0 s. If the distance between the base and the top of the staircase is 14.0 m, how much power will the student deliver by climbing the stairs

Answers

[tex]power = 205.8 \: watt \\ solution \\ mass = 66 \: kg \\ time = 44 \: sec \\ distance = 14 \\ now \\ power = \frac{w}{t} \\ \: \: \: \: \: \: \: \: = \frac{f \times d}{t} \\ \: \: \: \: \: = \frac{m \times g \times d}{t} \\ \: \: \: \: \: \: = \frac{66 \times 9.8 \times 14}{44} \\ \: \: \: \: = \frac{9055.2}{44} \\ \: \: \: \: \: = 205.8 \: watt \\ hope \: it \: helps[/tex]

Concrete and steel expand to almost the same amount when they are heated. Explain why you think this is lucky?

Answers

Answer:

While making a bridge or a building, the first thing that comes to our mind is that these are always made by the combination of concrete and steel. Concrete is cheap, but it has the property of breaking when it is twisted or under tension. Steel is expensive, If we made the whole thing with it, it will cost a lot. To provide strength under a reasonable cost, we use the combination of concrete and steel. Another postive point which they have together is that they both expand equally under heat, because they have the same coefficient of thermal expansion. It proves really useful, because if they had different coefficients of thermal expansions, one would expand more than the other, which will create tensions in the mixture and would break it easily. In the case, many cracks would start to appear in the bridge or buildings, which will eventually break them.

What is the most likely reason why these early flowers gradually changed to many different types of flowers over time?

Answers

Answer:

The flowers adapted to environmental conditions.

Explanation:

The ________ of a particle for a given ‘Interval of time’ is defined as the ratio of total distance travelled to the total time taken.

uniform speed
average speed
uniform velocity
average velocity

Answers

Answer:

The average speed of a particle for a given ‘Interval of time’ is defined as the ratio of total distance travelled to the total time taken.

Explanation:

To find the average speed we take the total

distance traveled divided by the time interval.

An object with more mass has more kinetic energy than an object with less
mass, if both objects are moving
OA) at the same speed
OB) in the same direction
OC) in opposite directions​

Answers

Explanation:

The kinetic energy of an object is given in terms of its mass and object as :

[tex]K=\dfrac{1}{2}mv^2[/tex]

An object with more mass has more kinetic energy. An object with less  mass, if both objects are moving at the same speed, in opposite directions, will have less kinetic energy. The square of v will give positive number.

Which force does not operate at a distance of 1 m?
A. Weak nuclear
O B. Electric
C. Gravitational
D. Magnetic

Answers

Answer:

A

Explanation:

The Force that doesn’t operate at the distance of 1m is Weak Nuclear

what is brightness. help asap

Answers

Answer:

The subjective visual sensation related to the intensity of light emanating from a surface or from a point source.

What are some advantages
and disadvantages to using
superconductors as electric
transmission lines

Answers

Answer:

Insulators show very high resistance to electricity. Conductors like copper show some resistance. Another class of materials show no resistance at all when cooled to very low temperatures, cooler than the coolest deep freezer. Called superconductors, they were discovered in 1911.

Explanation: i looked it up


A rubber band that has been stretched has gained ____ energy
OA) heat
OB) kinetic
OC) potential
D) chemical​

Answers

Answer: potential

Explanation:

why is no one helping?

Answers

Answer:

First one is hyperopia, second is myopia

Explanation:

Hyperopia is when the image is formed behind the retina.

Myopia is when images are formed infront of the retina.

A wire having resistance 20 ohm is bent to make a closed square.What is the resistance across the diagonal of square?

Answers

Answer:

5 Ω

Explanation:

When it is bent into a square, each side of the square will get 5 Ω resistance. As considered diagonally ,path of the wire between to diagonal points is the two sides of the square (that is half the length of the wire connected in parallel position). Which gives 10 ohm parallel to 10 ohm wire. So it finally read as 5 Ω wire

A) Is it possible for an object that, object with zero acceleration have velocity? If yes give an example if not give its proof.

Answers

Answer:

Yes, in case of uniform velocity

Explanation:

This is the case of uniform velocity. If a body covers equal displacement in equal intervals of time, then the velocity of a body is said to be ‘Uniform Velocity’. It meas that the velocity of a body remains constant during the motion and it does not change.

Since, acceleration is defined as the rate of change of velocity.

Therefore, if there is no change in velocity or in other words the change in velocity is zero, then the acceleration is also zero.

a = ΔV/t = 0/t

a = 0 m/s²

So, the acceleration of the body is 0 m/s², but it has a uniform velocity

Hence, it is possible for an object that, object with zero acceleration have velocity, which is the case case of uniform velocity.

a 50.0kg bicyclist on a 10.0kg bicycle speeds up from a 5.00m/s to 10.0m/s

Answers

Answer:

The total kinetic energy before accelerating = 750 JThe total kinetic energy after accelerating = 3,000 JTotal work done = 2,250 J

Explanation:

Given:

Mass of bicyclist = 50 kg

Mass of bicycle = 10 kg

Initial velocity (u) = 5 m/s

Final velocity (v) = 10 m/s

Find:

(a) What was the total kinetic energy before accelerating = ?

(b) What was the total kinetic energy after accelerating = ?

(c) How much work was done to increase the kinetic energy of the bicyclist = ?

Computation:

Total mass (M) = 50 kg + 10 kg = 60 kg

1. The total kinetic energy before accelerating = 1/2[Mu²]

The total kinetic energy before accelerating = 0.5[(60)(5)²]

The total kinetic energy before accelerating = 750 J

2. The total kinetic energy after accelerating = 1/2[Mv²]

The total kinetic energy after accelerating = 0.5[(60)(10)²]

The total kinetic energy after accelerating = 3,000 J

3. Total work done = Δ K.E

Total work done = 3,000 J - 750 J

Total work done = 2,250 J

4. ____________ occurs when one object slides over another.
a. Sliding friction
b. Static friction
c. Rolling friction
d. Net force

Answers

Answer:

A. Sliding friction

Explanation:

Sliding friction is weaker than static friction

Answer:

Rolling Friction

Explanation:

I know this because the definition of rolling friction is : type of friction that happens when one body rolls over another

A water distiller which is used to purify water. The distiller boils water and then condenses most of the water vapour back to water. (a) The water distiller is filled with 5.0 kg of water at 20 °C The specific heat capacity of water = 4 200 J/Kg °C Calculate the energy needed to raise the temperature of the water to 100 °C ___________________________________________________________________

Answers

Answer:

Energy needed 1680kJ

Explanation:

The quantity of heat required to raise the temperature of water to 100 degrees is expressed as

[tex]Q= mc(T2-T1)[/tex]

Given data

mass of water = 5kg

initial temperature T1= 20 °C

final temperature T2= 100 °C

Specific heat capacity of water=  4 200 J/Kg °C

[tex]Q= 5* 4 200(100-20)\\Q= 21000(80)\\Q= 1680000\\Q= 1680kJ[/tex]

The object will feel minimum force of gravity at the

Answers

Answer:

space , small amount of gravity is found in the space ,infact we can say that there is no gravity in the space

Answer:

Poles

Explanation:

The gravitational force is maximum at the equator and minimum at the poles.

what is the wavelength of radio waves transmitted by an FM station at 90MHz where 1M=10^6, and speed of radiowave is 3*10^8m/s

Answers

Answer:

λ = 3.33 m

Explanation:

Given:

Frequency = f = 9 × 10⁷ Hz

Speed = v = 3 × 10⁸ m/s

Required:

Wavelength = λ = ?

Formula:

v = fλ

Solution:

Putting the givens in the formula

v = fλ

λ = [tex]\frac{v}{f}[/tex]

λ = [tex]\frac{3*10^8}{9*10^7}[/tex]

λ = 0.33 × 10¹

λ = 3.33 m

An object rotates describing a horizontal circumference when subjected to a centripetal force F. What centripetal force will act on the object if the radius of the circle is doubled and the kinetic energy of the object is halved? A) F/4 B) F/2 C) F D) 4F please explain this to me : (

Answers

Answer:

Option A:  F/4

Explanation:

Centripetal force, [tex]F = \frac{mv^{2} }{r}[/tex]

Where v = speed

r = radius

Since Kinetic Energy, [tex]E_{k} = 0.5 mv^{2}[/tex]

Writing centripetal force in terms of kinetic energy, [tex]F = \frac{2 E_k}{r}[/tex]

If the initial radius of the circle, r₁ =r

The doubled radius, r₂ = 2r

If the initial kinetic energy, [tex]KE_1 = E_{k}[/tex]

The halved kinetic energy,  [tex]KE_2 = 0.5E_{k}[/tex]

Therefore, the new Centripetal force becomes:

[tex]F_{2} = \frac{2(0.5 E_k)}{2r} \\F_{2} = \frac{0.5 E_k}{r}\\F_{2} =\frac{1}{4} * \frac{2 E_k}{r}\\Since, F = \frac{2 E_k}{r} \\F_{2} =\frac{1}{4} * F\\F_{2} =\frac{F}{4}[/tex]

A sheet of paper 3.0 cm by 4.0 cm is lying on the desk. If the atmospheric pressure is 1.013105 Pa, what is the total force exerted on the top side of the paper by the atmosphere?

Answers

Answer:

132.56N

Explanation:

Pressure is defined as force per unit area.

Expressed mathematically as;

P = F/A

Where P-pressure

F-force

A-area

From the above formula,

F= P×A

= 1.1013 × 10^5 × (3×4/10000)

= 11.013×12 =132.56N

Note: the unit of measure in cm is converted to m and since 100cm makes 1m for each sides 3cm and 4cm we convert to 'm' by dividing by 100 twice giving division by 10000)

The unit of measure Pa means Pascal and is the same as N/m2

Write down any four points that should be considered during household wiring

Answers

1. Safety equipment is available
2. Person attempting the task has some general knowledge about wiring
3. Not All Cable is Color-Coded
Cable-sheath color coding started in 2001 and is still voluntary. If you have older wiring, don’t assume it complies with the current color coding. However, most manufacturers now follow the standard color code.
4. Stranded wire is more flexible than solid. If you’re pulling wire through conduit, stranded wire makes it easier to get around corners and bends in the conduit. However, if the situation requires pushing wires through conduit, you’ll want to use solid wire.

Answer:

USE RUBBER CLOVES

USE A PLIER

USE CONDUCTIVE WIRES

SWITHC OFF THE MAIN SWITCH WHILE WIRRING

Explanation:

Which objects would sink in honey, which has a density of 1.4 g/cm³? Check all that apply.

Answers

Answer:

any object that has density more than 1.4

Explanation:

The object that has density more than 1.4 is denser than the honey

An astronaut is moving in space when a big explosion occurs about 50 meters behind him. How will the astronaut come to know about the explosion?
Choose:--
From the sound of the explosion
From the light due to the explosion
From light and sound due to the explosion
From the vibrations due to the explosion

Answers

Answer:

The correct answer is B.

The astronaut will know due to the light from the explosion.

Explanation:

Sound and vibrations require a medium such as air to travel through. Space, there is no air. Only a vacuum. So sound and vibrations are unable to travel. Light requires no medium to travel. It can go through a vacuum.  

Therefore the Astronaut will see a bright flash of light as it travels from the explosion to outer space. It is also important to note that light can travel very far because nothing else interacts with its wave particles and as such, it cannot be impeded.

Cheers!

A 2kg object is dropped from a height 10m.Calculate the speed of the object after it has fallen 5m, assuming there is no resistance. g= 10 N/kg​

Answers

Answer:

10m/s

Explanation:

[tex]d=v_ot+\dfrac{1}{2}at^2[/tex]

Since there is no initial velocity as the object is dropped, you can write the following equation:

[tex]5=\dfrac{1}{2}(10)t^2 \\\\1=t^2 \\\\t=1[/tex]

Now that you know how long the fall took, you can use another physics equation to find the velocity at that point.

[tex]v_f=v_o+at[/tex]

Since there once again is no initial velocity, you can rewrite this as:

[tex]v_f=at=(10)(1)=10m/s[/tex]

Hope this helps!

The kinetic energy the object has at any point during the fall is exactly the potential energy it lost by falling to that height.

Potential energy = (mass) · (gravity) · (height)

Change of potential energy = (mass) · (gravity) · (change of height)

Change of potential energy = (2 kg) · (10 m/s ) · (-5 m)

Change of potential energy = 100 Joules

Kinetic energy = (1/2) · (mass) · (speed²)

Kinetic energy = (1 kg) · (speed² )

100 J = (1 kg) · (speed²)

Speed² = (100 J) / (1 kg)

Speed² = (100 kg-m²/s²) / (1 kg)

Speed² = (100 m²/s²)

Speed = 10 m/s  

When the kinetic energy of particles in a substance decreases, what also decreases?
93
The size of the particles in the substance.
The number of particles in the substance.
The substance's specific heat.
The substance's temperature.

Answers

Answer: D

The substance's temperature

Explanation:

According to kinetic theory, increase in temperature causes increase in kinetic energy of particles in a system.

When the kinetic energy of particles in a substance decreases, it has nothing to do with the size of the particles and the specific heat capacity of the particles or substance. But it a clear indication that the substance temperature has also decreased.

Answer:

D

Explanation:

Calculate the transfer of energy by a force of 15N when it moves the object by a distance of 5m
a. In the direction of the force

b. In a direction at 60° to the direction of the force


c. At right angles to the force

NEED EXPLAINATION

Answers

Answer:

a) 75 J

b) 37.5 J

c) 0

Explanation:

Work is the force exerted on an object causing it to move, Work is the product of force and displacement. Work is not done if the force and displacement are at right angles to each other. It is given by:

[tex]Work(energy)=Fxcos(\theta)[/tex]

F is the force, x is the displacement and Θ is the angle between force and displacement.

a) Force (F) = 15N and distance (x) = 5. Since it is in the direction of the force, Θ = 0

[tex]Work(energy)=Fxcos(\theta)= 15*5*cos(0)=75J[/tex]

b) Force (F) = 15N and distance (x) = 5.  Θ = 60

[tex]Work(energy)=Fxcos(\theta)= 15*5*cos(60)=37.5J[/tex]

c) Force (F) = 15N and distance (x) = 5.  Θ = 90

[tex]Work(energy)=Fxcos(\theta)= 15*5*cos(90)=0[/tex]

Other Questions
State true or false The measure of the supplementary angle of the complementary angle of an angle with measure 35 degree is 125 degree Need help with this question Order these numbers from least to greatest.1.4, 1.103, 1.1322, 1.13 If you were standing at Earth's geographic North Pole and holding a compass, the magnetic north pole of the compass needle would be pointing _____. A. eastward B. westward C. toward the geographic North Pole D. toward the geographic South Pole How many years would it take for Jughead to save an adequate amount for retirement if he deposits $2,000 per month into an account beginning today that pays 12 percent per year if he wishes to have a total of $1,000,000 at retirement State two factors that contribute to poor handwritting (06.07 MC)The function below models the correlation between the number of hours a plant is kept in sunlight (x) and the height (V), in mm, towhich it grows:y = 4 + 2xWhat does the slope of this function represent? (1 point)Select one:a The original height of the plant was 4 mm.b. The original height of the plant was 2 mm.C. The height of the plant increases by 2 mm for every hour of sunlight it receives.d. The height of the plant increases by 4 mm for every hour of sunlight it receives. Solve x2 - 4x - 7 = 0 by completing the square. What are the solutions? Which statement is true? The elegy in ancient Greece included choral songs that accompanied Greek dramas. The ode and the elegy are written to honor the passing of a loved one. The ode and the elegy have similar poetic structures. An ode and an elegy may have different poetic structures. discuss the poem the leader and the led as a satire A quick quiz consists of a multiple-choice question with 5 possible answers followed by a multiple-choice question with 5 possible answers. If both questions are answered with random guesses, find the probability that both responses are correct. Report the answer as a percent rounded to two decimal place accuracy. You need not enter the "%" symbol. Probability = % How do you go from 98 to 720 using just one letter?RIDDLE... Suppose that a small company that makes a standardized product is experiencing an increase in sales even though it has a small geographic footprint. Currently, the founder makes all of the strategic decisions but is beginning to feel overwhelmed. She has decided to pursue a cost-leadership strategy going forward. In order for the firm to achieve its goals, which of the following business-level structures should the firm adopt?a. an ambidextrous functional structureb. a centralized functional structurea exible organic structurec. a centralized multidivisional structured. a simple structure with the founder's imprint The cheerleaders at Central Junior High drink orange juice after their practices. Each can contains 160 mL of juice. How many milliliters are in 2 cans? 2 PointsWhy can exercising outdoors be a particularly dangerous time for your lungs?A. During exercise, you take in up to two to three times the amountof air that you normally breathe, which also means you inhalemore pollutants.B. During exercise, you take in up to two to three times the amount ofair that you normally breathe, which overloads your muscles withoxygen, causing cramps.O C. During exercise, you take in up to two to three times the normalamount of air that you would breathe during that time period,which can give you a migraine headache.O D. During exercise, you take in up to two to three times the amount ofair that you normally breathe, which can make you light-headed,increasing your risk of falling and hurting yourself. Jeanie wrote the correct first step to divide 8z2 + 4z 5 by 2z. Which shows the next step?A.4z + 2 B.4z2 + 2 C.4z2 + 2 D.4z + 2 Please help me with those questions please why was pizza made, who was the creater of pizza,and why is pizza spelled with z's instead of S's what is the solution for this equation [3y+7]=13 which story is the shortest the book of Ruth (the Bible) A Sound of Thunder The Last Leaf Rip Van Winkle Charles Flowers for Algernon The Purloined Letter Love is a Fallacy Where Love Is, There God Is Also The Night the Ghost Got In