Question

What is meant by positive, negative, and zero work done? $\left(4\text{marks}\right)$

Answer 1

Work is said to be done when a force applied to an object creates a displacement in it.

If the force applied on an object creates a displacement in the direction of the force or along the component of force, the work done is said to be postive. $\left(1.5\text{marks}\right)$

If the force applied on an object creates a displacement in the opposite direction to force applied, the work done is said to be negative. $\left(1\text{mark}\right)$


If the force applied fails to create or creates a displacement perpendicular to the direction of application of force, the work done is said to be zero. $\left(1.5\text{marks}\right)$