Physics

Problem

A skateboard and rider are moving in a straight line at

4.0\,\text{m/s}

. Measurements show that their translational kinetic energy is

64\;\text{J}

. Determine the combined mass of the skateboard and rider. a)

16\,\text{kg}

4.0\,\text{kg}

8.0\,\text{kg}

32\,\text{kg}