3) On a frictionless air track a 0.30 kg glider is moving at 0.40 m/s to the right and collides with a 0.80 kg glider moving at 0.15 m/s to the left. If the bumper on the gliders is perfectly elastic, what is the final velocity of each glider? (-0.4 m/s, 0.15 m/s)
4) A 2.4 kg billiard ball moving in a straight line at 10 m/s to the right makes a head on collision with another ball that is 3.6 kg and is at rest. What percentage of the first balls kinetic energy is transferred to the second ball after the collision? (-2 m/s, 8 m/s, 96%)
5) A 2.0 kg trolley moving east at 3.0 m/s collides head-on with a 1.0 kg trolley moving west at 2.0 m/s. After the collision, the 2.0 kg trolley has a velocity of 1.0 m/s [E]. (This is not an elastic collision so you can not use the new formulas to find the final velocity).
a) What is the final velocity of the 1.0 kg trolley? (2.0 m/s [E])
b) Show that the collision is not elastic by finding how much kinetic energy was lost.
6) A 300 g ball is rolling at 50 cm/s toward a 200 g ball that it moving at 100 cm/s toward the first ball.
a) what are the velocities after the collision if it is perfectly elastic? (-70 cm/s, 80 cm/s)
b) What are the velocities after the collision if it is perfectly inelastic? (-10 cm/s)
c) How much kinetic energy was lost in part b? (0.135 J)