Question

situations where no work is done by force2
Select the correct answer.
In which situation is no work considered to 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

answer
B] when the angle between the force and displacement is 90°

because The work is defined as the product of component of the force in the direction of the displacement and the magnitude of the displacement .

W = FScosƟ
Ɵ = 90
W = Fscos90
W = 0 (hence no work is done)

Answer 2

option D is the situation in which no work is done