Question

A force of 100 N acting on a certain mass for 4 sec gives it a velocity of 20 m/s. Find the mass of the body if the body was initially at rest.

Answer 1

Here is the answer...!!!

Refer to the attachment...!!

Answer 2

Answer:

F=100N

T=4sec

V=20m/s

Now ,

a=v-u÷t

= 20-0÷4

=5.

Then ,

m=f÷a

=100÷5

=20.