Two cars travelling in opposite directions crash. Car 1 travelling left at 25 m/s with mass 2400 kg and Car 2 travelling right at 15 m/s with mass 1800 kg.
(a) If the cars stick together, what is their final speed?
(b) If Car 1 bounces back at 5 m/s, what is the final speed of car two and in which direction?
A 2000 kg car is travelling at 20 m/s and stops moving over a 10 second period. What was the magnitude of the average breaking force?
A mass of 2 kg is moving at a speed of 10 m/s along a horizontal, frictionless surface. It collides, and sticks, with a 3 kg mass moving in the same direction at 5 m/s.
What is the final velocity of the system after the collision?
What percentage of kinetic energy is lost in the collision?
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