A block of mass rests on a smooth horizontal surface

PHYSICS · Single correct · GCSE · Physics · Energy · Energy

Problem

A block of mass

m

rests on a smooth horizontal surface. Starting from rest at

t=0

, it is pulled by a constant horizontal force

F

. How does the instantaneous power delivered by the force depend on time

t

? (a) Proportional to

t^{-1}

(b) Proportional to

t

t^{2}

(d) Independent of

t