Question

A body of mass $10\text{kg}$ is kept on a rough horizontal surface. A force of $50\text{N}$ is required to just move the body. If the body is cut into two equal parts and placed one over the other, find the force required to just move the body.

• A. $10\text{N}$
• B. $25\text{N}$
• C. $50\text{N}$
• D. $100\text{N}$

Answer 1

The correct option is C $50\text{N}$

Frictional force only depend on the contact surface and is independent of area of contact. Hence force required will be the same.