Question

A sprinter accelerates from rest. Is the work done on the sprinter positive, negative, or zero? Explain

Short answer

Work done on sprinter is negative.

Step-by-step solution

Given information

A sprinter accelerates from rest.

Explanation

When sprinter accelerates, the work done on sprinters is due to normal reaction on sprinter.

As the sprinter takes off from ground, work done is calculated by the frictional force acting on when sprinter takes off foot from ground.

So ,the normal reaction on the sprinter is negative giving negative work done on the sprinter.