Question

In which situation is no work considered tone be done by a force?

A) when the angle between the force and displacement is 180°
B) when the angle between the force and displacement is 90°
C) when the angle between the force and displacement is 45°
D) when the angle between the force and displacement is 0°

Answer 1

According to the technical definition of "work",
no work is considered to be done by a force when
the angle between the force and displacement is 90° . (B)