1. Atop a 2.2 meter high frictionless ramp, a 10 kg mass is moving at speed 4.9 m/s. The mass slides down to ground level and hits a stationary 6.8kg mass. The masses stick together. What is their combined speed ?

2. A 5 kg mass moving at speed 23.6 hits and sticks to a stationary 4 kg mass on a horizontal frictionless surface. The combined mass then slides up a rough (=0.36) ramp inclined at 38. How far do the masses move before coming to a momentary stop?

3. On a level frictionless surface, a 800 kg car moving at 23 kph hits a stationary 316 kg motorcycle. After the collision, the car is moving at 10 kph. If the collision time is 2.7 milliseconds, find the collision force: