Chapter 4 - Force and Motion - Learning Path Questions and Exercises - Exercises - Page 136: 28

a). $2m/s^{2}$ b). $4N$ c). $4N$

a). Total mass = 3+2=5 kg. $acceleration=\frac{10N}{5kg}=2m/s^{2}$ b). The block B moves due to force exerted by block A on it. Force $=m\times a=2\times2=4N$ c). The force exerted by block B on A is same as the force exerted by A on B which is 4N only in the opposite direction.