Which expression gives the instantaneous mechanical power delivered by a constant…

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

Which expression gives the instantaneous mechanical power

P

delivered by a constant force of magnitude

F

that acts parallel to the velocity

v

of an object moving in a straight line? (a)

P = \dfrac{1}{2}Fv

(b)

P = 2Fv

(c)

P = Fv

(d)

P = Fv\sin45^{\circ}