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Question

For how long should a force of 100 N act on a body of 20 kg so that it acquires a velocity of 100 m/s?

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Solution

We are going to find acceleration
Force = mass × acceleration
100=20×aa=10020a=5
Now, putting these values in the equation:
v=u+at100=0+5×t100=5tt=20
So, the required time is 20 s.

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