A box is pulled along a floor by a force of 3.0 N. The friction acting on the box is 1.0 N, as shown. How much kinetic energy does the box gain in moving 2.0 m

Answer:

P = 90 W

Explanation:

Mass of an object, m = 30 kg

Speed of the object, v = 15 m/s

Distance, d = 10 m

Work done, W = 900 J

Time, t = 10 s

We need to find the power generated by this project. We know that power is equal to work done divided by time taken.

So,

[tex]P=\dfrac{W}{t}\\\\P=\dfrac{900\ J}{10\ s}\\\\P=90\ W[/tex]

So, the required power generated is 90 W.

Answer:

i think its D Or maybe C not sure rly

Answer:

250.05 J

Explanation:

From the question given above and, the following data were obtained:

Mass (m) = 0.7 kg

Kinetic energy (KE) = 250.1 J

Potential energy (PE) =?

Next, we shall determine the velocity of the ball. This can be obtained as follow:

Mass (m) = 0.7 kg

Kinetic energy (KE) = 250.1 J

Velocity (v) =?

KE = ½mv²

250.1 = ½ × 0.7 × v²

250.1 = 0.35 × v²

Divide both side by 0.35

v² = 250.1 / 0.35

Take the square root of both side

v = √(250.1 / 0.35)

v = 26.73 m/s

Next, we shall determine the maximum height reached by the ball. This can be obtained as follow:

Initial velocity (u) = 26.73 m/s

Final velocity (v) = 0 m/s (at maximum height)

Acceleration due to gravity (g) = 9.8 m/s²

Maximum height (h) =.?

v² = u² – 2gh (since the ball is going against gravity)

0² = 26.73² – (2 × 9.8 × h)

0 = 714.4929 – 19.6h

Collect like terms:

0 – 714.4929 = – 19.6h

– 714.4929 = – 19.6h

Divide both side by –19.6

h = –714.4929 / –19.6

h = 36.45 m

Finally, we shall determine the potential energy of the ball at the maximum height. This can be obtained as follow:

Mass (m) = 0.7 kg

Acceleration due to gravity (g) = 9.8 m/s²

Maximum height (h) = 36.45 m

Potential energy (PE) =?

PE = mgh

PE = 0.7 × 9.8 × 36.45

PE = 250.05 J

Thus, the potential energy at the maximum height is 250.05 J.

Answer:

30 maybe?

Explanation:

Answer:- 30 km/hr

Given :- Distance covered by Salesman 50 km

Time taken;- 2 hrs and 30 minutes

Speed of salesman: Distance/ time taken

50 / 2 1/2 = 20 km/hr

He has make it 5/6 less

2 1/2 —5 / 6 = 5 / 3 hrs

Speed : Distance / Time

50 km / 5/3 = 30

He has to travel at 30 km per hour.

Answer:

there is the answer

Explanation:

Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Answer:

P = 2,000 W

Explanation:

Work and Power

Work is the amount of energy transferred by a force over a distance. It's a scalar quantity, with SI units of joules.

If both the force F and displacement s are parallel, then we can use the equivalent scalar formula:

W=F.s

Power is the amount of energy transferred or converted per unit of time. In the SI, the unit of power is the watt, equal to one joule per second.

The power can be calculated as:

[tex]\displaystyle P=\frac {W}{t}[/tex]

Where W is the work and t is the time.

A box with a weight of 1,000N is lifted by s=20 m by a rope and pulley system. The system exerts a force equal to the weight of the box, thus F=1,000 N. The work done by the system is:

W =1,000 N * 20 m

W = 20,000 J

Now we calculate the power developed by the system in t=10 seconds:

[tex]\displaystyle P=\frac {20,000}{10}[/tex]

P = 2,000 W

I think its "a dropped penny sinks at the bottom of a pond". Because, non-contact force is a force that you don't touch, like gravity or weight, that falls but you didn't drop it on purpose nature did or gravity itself did.

Answer:

The magnification produced by a plane mirror is +1

means then the size of the image is equal to the size of the object. If m has a magnitude greater than 1 the image is larger than the object, and an m with a magnitude less than 1 means the image is smaller than the object.

Answer:

Inertia is the tendency of an object to resist a change in its motion. Because of inertia, a resting object will remain at rest, and a moving object will keep moving. Objects with greater mass have greater inertia

Answer:

A

Explanation:

I took that test

Answer:

D

Explanation:

Through the process of cellular respiration, Energy in food is converted into energy that can be used by the body.

During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, energy is transferred  to ATP  

Answer: 4.5 V

Explanation:

Given

The voltage of each cell is 1.5 V

If they are connected end to end their potential added to give a higher potential i.e. 1.5+1.5+1.5=4.5 V

Answer:

they would repel because they have the same charge. Charges that are different will stick together.

Answer:

Choice: D.

Explanation:

Newton’s Law of Universal Gravitation

It states that objects attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance between them.  The formula is:

[tex]\displaystyle F=G{\frac {m_{1}m_{2}}{r^{2}}}[/tex]

Where:

m1 = mass of object 1

m2 = mass of object 2

r     = distance between the objects' center of masses

G   = gravitational constant: [tex]6.67\cdot 10^{-11}~Nw*m^2/Kg^2[/tex]

The center of mass of a cow is at a distance of r=208 m from the center of the mass of a tractor. The gravitational force of attraction is [tex]F=1.8\cdot 10^{-9}\ N[/tex]. It's required to find the new force of attraction F' if the distance was r'=416 m.

It can be noted that r'=2r. If the distance is doubled, the new force is:

[tex]\displaystyle F'=G{\frac {m_{1}m_{2}}{(2r)^{2}}}[/tex]

[tex]\displaystyle F'=\frac{1}{4}G{\frac {m_{1}m_{2}}{r^{2}}}[/tex]

Substituting the original value of F:

[tex]\displaystyle F'=\frac{1}{4}\cdot 1.8\cdot 10^{-9}\ N[/tex]

Operating:

[tex]\displaystyle F'=4.5\cdot 10^{-10}\ N[/tex]

Choice: D.

Answer:

Answer is on the pic

Explanation:

I hope it's helpful!

Answer:

nebula

Explanation:

Answer: hey

Explanation:

Answer:

equal to

(sorry if this is late)

Explanation:

Rest of the answers.

As solar wind approaches Earth, what happens to the charged electrons?

They are deflected as Earth’s magnetic field exerts force on them.

Which best describes how energy transferred from an electron in the solar wind compares with energy absorbed by an electron in the oxygen atom?

equal to

Which statement is accurate about how the aurora borealis is formed?

When the electrons fall to a lower energy state, they release energy as electromagnetic radiation, light.

How does the energy in the light of the aurora borealis compare to the energy as an excited electron returns to its original energy level?

equal to

During the formation of the aurora borealis, the electrons in an atom experience a change in energy levels. Which statement about this change is accurate?

First, the electron absorbs energy to move to a higher energy level.

The energy transferred from an electron in the solar wind is equals to energy absorbed by an electron in the oxygen atom.

Energy transformation is the process of changing energy from one form to another form.

It is known that  the energy transferred from an electron in the solar wind is equals to energy absorbed by an electron in the oxygen atom.

Hence the energy transferred from an electron in the solar wind is equals to energy absorbed by an electron in the oxygen atom.

Learn more about the transformation of energy here:

https://brainly.com/question/17448762

Answer:

Explanation:

The mass of the car can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{2700}{1.63} \\ = 1656.4417...[/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

6.25

The magnitude of the centripetal force that must be applied is 6.25 N.

The given parameters;

The magnitude of the centripetal force that must be applied is determined by the product of the mass of the object and the centripetal acceleration.

The centripetal force is calculated as follows;

[tex]F_c = ma_c = \frac{mv^2}{r} \\\\F_c = \frac{0.5 \times 5^2}{2} \\\\F_c = 6.25 \ N[/tex]

Thus, the magnitude of the centripetal force that must be applied is 6.25 N.

Learn more here: https://brainly.com/question/14905888

Answer:

0.45m/s

Explanation:

Given parameters:

Distance = 1.8m

Time  = 4s

Unknown:

Speed of the car  = ?

Solution:

The speed of a body is the distance divided by the time.

       Speed  = [tex]\frac{distance}{time}[/tex]  

So;

     Speed  = [tex]\frac{1.8}{4}[/tex]   = 0.45m/s

Answer:

4.7m

Explanation:

Given parameters:

Mass of the book  = 1kg

Gravitational potential energy  = 46J

Unknown:

Height of the shelf  = ?

Solution:

The potential energy is due to the position of a body above the ground.

        Gravitational potential energy  = mgh

m is the mass,

g is the acceleration due gravity  = 9.8m/s²

h is the height which is unknown

                       46  = 1 x 9.8 x h

                       h  = 4.7m

Answer:

the answer is differences hope this helped :)

The main cause of weather is differences in temperature around the Earth.

The weather could define the atmosphere. It could be either hot, cold, cloudy, or stormy. In the case of the earth, the phenomena of weather should arise at the bottom layer of the planet's atmosphere. Due to this, the main cause of the weather should be of differences.

learn more about earth here: https://brainly.com/question/17252385