A 25 kg mass or a 30 kg mass going 5 m/s. Two 10 kg masses,

Last updated: 7/10/2022

A 25 kg mass or a 30 kg mass going 5 m/s. Two 10 kg masses, one going 75 m/s, one going 45 m/s. A car at rest or a car rolling down a hill. A heavy bike or a light bike.