Two identical carts start from rest on a horizontal track

PHYSICS · Subjective · CBSE · Physics · Work and Energy · Work and Energy

Problem

Two identical carts start from rest on a horizontal track. Cart X is pushed until it reaches

3.0\,\text{m}\,\text{s}^{-1}

, while Cart Y is pushed until it reaches

6.0\,\text{m}\,\text{s}^{-1}

. By what factor is the kinetic energy of Cart Y greater than that of Cart X?