For a car of mass that starts from rest on a horizontal road

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

Problem

For a car of mass

m

that starts from rest on a horizontal road, its engine supplies a constant power

P

. Neglect all resistive forces. The instantaneous acceleration

a

of the car varies with time

t

as (a)

a\propto t^{1/2}

(b)

a\propto t^{-1}

(c)

a\propto t^{-1/2}

(d)

a

is constant