Two toy carts

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

Problem

Two toy carts, one of mass

2\,\text{kg}

and the other of mass

8\,\text{kg}

, are initially at rest on a smooth floor. The same amount of work,

40\,\text{J}

, is done on each cart. What is the ratio of the final speed of the lighter cart to that of the heavier cart? (a)

4:1

(b)

1:2

(c)

2:1

(d)

1:1