Question

In the math equation W = F × D, what relationship is required for work to be accomplished?

The force must be in the same direction as the movement.
The force must be equal to the distance.
The force must be perpendicular to the distance.
The force must be greater than the distance.

Answer 1

The force must be in the same direction as the movement.

Explanation: W = F·D = F D cosθ, so only the component of force along the displacement does work. If the force is perpendicular (θ = 90°) work is zero; work is maximal when force and displacement are in the same direction (θ = 0°).