Question

The mass m is placed on a body of mass M. There is no friction. The force F is applied on M and it moves with acceleration a. Then, net force on the top body is

• A. F
• B. ma
• C. F - ma
• D. None of these

Answer 1

The correct option is D None of these

Solution :

Since, no force of friction is present. So, no horizontal force is present on body of mass m. In vertical direction normal force balances weight of the body. Hence, net force of top body must be zero. Lesser contact force corresponds more comfortableness.