Question

A body mass is 0.15kg undergoes a change of velocity of 4cm/s in 4s what is the force acting on it

Answer 1

mass of body=0.15kg

                      =150 g

acceleration=change in velocity/time

                   =(4cm/s)/4s

                   =1cm/s^2

force=ma

       =150g*1cm/s^2

       =150g or 0.15kg

Answer 2

Given Mass=0.15kg
Velocity= 4cm/s= 4÷100=0.04m/s
T=4s

Formula= f=ma
Solution:-
Acceleration= Velocity÷Time
= 0.04÷4
=0.01 m/s2
F=ma
=0.15×0.01
=0.0015 N