Which of the following expressions gives the instantaneous power delivered to an…

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

Problem

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

F

acts on the object moving with speed

v

, and the angle between the force and velocity vectors is

\theta

? (a)

P = F v

(b)

P = F v \cos^{2}\!\theta

(c)

P = F v \cos \theta

(d)

P = F v \sin \theta