Question

A bowling ball travels at 2.0 m/s. it has 16j of kinetic energy. What is the mass of the bowling ball in kilograms?

Answer 1

`v=2\ m/s\\\\E_k=16\ J=16\ (kgm^2)/(s^2)\\\\E_k=(mv^2)/(2)\\\\(m\cdot(2\ m/s)^2)/(2)=16\ (kgm^2)/(s^2)\\\\(m\cdot4\ m^2/s^2)/(2)=16\ (kgm^2)/(s^2)\\\\2m\ m^2/s^2=16\ (kgm^2)/(s^2)\ \ /:2\ m^2/s^2\\\\m=8\ kg-answer`