# A force of 10 N acts on a body of 2kg for 3 seconds.find the kinetic energy acquired by the body in 3 seconds.

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You can solve the problem in different ways:

1. find work done and that is equal to KE.

2. find velocity and then power and then work done.

3. find velocity and then KE directly.

I am using the third one.

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mass = 2kg

force = 10N

time = 3s

acceleration = F/m = 10/2 = 5m/s²

velocity = u+at = 0+5×3 = 15m/s

KE =

1. find work done and that is equal to KE.

2. find velocity and then power and then work done.

3. find velocity and then KE directly.

I am using the third one.

-----------------------------------------------------------------------------------------------

mass = 2kg

force = 10N

time = 3s

acceleration = F/m = 10/2 = 5m/s²

velocity = u+at = 0+5×3 = 15m/s

KE =

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