Physics

Problem

Three objects move on a straight road as described below: Object P: mass

2\,\text{kg}

, speed

5\,\text{m/s}

Object Q: mass

4\,\text{kg}

, speed

3\,\text{m/s}

Object R: mass

1\,\text{kg}

, speed

9\,\text{m/s}

Arrange P, Q and R in ascending order of their kinetic energies.