Question

A mat of mass 2 kg and length 2 m is placed on the floor one of the end of the matter is pulled with a constant speed of 1 m/s towards the other end till the other end comes into motion . How much force is required to do this ??

Answer 1

S=2m
v=1 m/s
So t=2s

Now F=(mv-mu)/t=mv/t=2×1/2=1 N ans.