1)What net force is required to increase the velocity of a 115 kg scooter from 4.50 m/s to 18.0 m/s over a time of 12.0 s?
2) A 131 kg NFL defensive end runs to the right at 7.80 m/s towards a 97.0 kg running back that is running at 8.00 m/s to the left. The players have a head-on, perfectly inelastic collision. What is the velocity of players after the defensive end makes the tackle?
3)An 85.0 kg bicycle and its rider riding at 9.00 m/s to the right crashes into a 56.0 kg skater that is moving at 3.00 m/s to the left. After the crash, the bicycle and rider continue moving to the right at 1.20 m/s to the right. What is the final velocity of the skater?
4)Two boxes on a frictionless surface have a head-on, *perfectly elastic* collision.
Box 1 has a mass of 3.00 kg and an initial velocity of 5.00 m/s to the right.
Box 2 has a mass of 8.00 kg and an initial velocity of 2.00 m/s to the left.
What are the velocities of both boxes after they collide?
Write your answer in a complete sentence.
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