Question

When the force and the displacement are in the opposite direction (θ=180°), the work done by the force is ________. *
​

Answer 1

When the force and displacement are in the opposite direction, the work done is said to be negative. But when force and displacement are at an angle of 90 degrees, the work done is said to be zero. Energy is defined as the ability of an object to do work. Joules is the unit of energy.

HOPE THIS HELPS