Question

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

Answer 1

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Answer 2

Answer:

First we will use the equation F=ma

100 = 20×a (F=100N, m=20 kg )

Therefore, a =100/20 =5m/s^2

The body was initially at rest

So, u=0m/s

v=100m/s

Now we will use the first equation of motion

v = u + at

100 = 0 +5×t

100 = 5t

t = 20 sec.