Two objects are moving along the same straight line

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

Problem

Two objects are moving along the same straight line. They cross a point

A

with accelerations

a

and

2a

, and velocities

2u

and

u

, respectively, at time

t=0

. The distance moved by the object when one overtakes the other is (1)

\frac{6u^2}{a}

(2)

\frac{2u^2}{a}

(3)

\frac{4u^2}{a}

(4)

\frac{8u^2}{a}