A trolley’s speed increases from to while its mass remains the same

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

Problem

A trolley’s speed increases from

2\,\text{m/s}

6\,\text{m/s}

while its mass remains the same. By what factor does its kinetic energy change? (a)

8

(b)

9

(c)

3

(d)

12