Question

Explain work done when a body is moved horizontally along the friction less surface. [2 MARKS]

Answer 1

Each point: 1 Mark

1. Let’s consider a block kept on the table. Force acting on the block is F. Due to application of that force block moves a distance of s horizontally along the direction of the force.

If we ignore the frictional force acting on the block, net force acting on the block is F.

2. Work done = Force x Displacement x Cosθ

Since θ = 0 , cos 0=1

Work done = F x s