Which of the following expressions gives the instantaneous mechanical power delivered…

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

Which of the following expressions gives the instantaneous mechanical power delivered to an object when a constant force of magnitude

F

acts on it while the object moves with speed

v

, and the angle between the force and the velocity is

\theta

? (a)

P = F v \sin \theta

(b)

P = \dfrac{1}{2} F v \cos \theta

(c)

P = F v

(d)

P = F v \cos \theta