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3. A 3-kg block moving 4 m/s to the right collides with an 8-kg block moving 2 m/s to the left. a) If the two blocks stick together, what is the final velocity? b) If the two blocks collide elastically and the 3-kg block moves to the left at 1 m/s, what is the final velocity of the 8-kg block? c) How much kinetic energy is "lost" in the collision in a)?

3. A 3-kg block moving 4 m/s to the right collides with an 8-kg block moving 2 m/s to the left. a) If the two blocks stick together, what is the final velocity? b) If the two blocks collide elastically and the 3-kg block moves to the left at 1 m/s, what is the final velocity of the 8-kg block? c) How much kinetic energy is "lost" in the collision in a)?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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1. A 5-kg mass moving to the right at a speed of 10 m/s collides with an unknown mass initially moving to the left at the same speed. After collision, they both move to stick together and stopped, V = 0 m/s. Find the unknown mass. 2. A 200-g ball moving toward the right at a speed of 30 cm/sstrikes a 400-g ball moving toward the left at an unknown speed, v. After collision they stick together and remain motionless. Find the speed of the 400-g ball before the collision. 3. A 3-kg block moving 4 m/s to the right collides with an 8-kg block moving 2 m/s to the left. a) If the two blocks stick together, what is the final velocity? b) If the two blocks collide elastically and the 3-kg block moves to the left at 1 m/s, what is the final velocity of the 8-kg block? c) How much kinetic energy is "lost" in the collision in a)? 4. aWhat is the momentum of a jeepney weighing 1.5 x 10- N moving at a velocity of 20 m/s? b) How long must an 88-N force act on the jeepney to support that momentum? 5. How long must a force of 100 N act on a 20-kg rocket to increase its speed from 100 m/s to 150 m/s? 6. A 1500-kg car increases its speed 10 m/s to 30 m/s in 4 seconds. a) What is the initial momentum of the car? b) What is the final momentum? c) What is the change in its momentum? d) What force produced this change in the momentum of the car? 7. What is the momentum of an electron (Mo = 9.1 x 101 kg) which is moving at a speed of 2.0 x10" m/s?
Transcribed Image Text:1. A 5-kg mass moving to the right at a speed of 10 m/s collides with an unknown mass initially moving to the left at the same speed. After collision, they both move to stick together and stopped, V = 0 m/s. Find the unknown mass. 2. A 200-g ball moving toward the right at a speed of 30 cm/sstrikes a 400-g ball moving toward the left at an unknown speed, v. After collision they stick together and remain motionless. Find the speed of the 400-g ball before the collision. 3. A 3-kg block moving 4 m/s to the right collides with an 8-kg block moving 2 m/s to the left. a) If the two blocks stick together, what is the final velocity? b) If the two blocks collide elastically and the 3-kg block moves to the left at 1 m/s, what is the final velocity of the 8-kg block? c) How much kinetic energy is "lost" in the collision in a)? 4. aWhat is the momentum of a jeepney weighing 1.5 x 10- N moving at a velocity of 20 m/s? b) How long must an 88-N force act on the jeepney to support that momentum? 5. How long must a force of 100 N act on a 20-kg rocket to increase its speed from 100 m/s to 150 m/s? 6. A 1500-kg car increases its speed 10 m/s to 30 m/s in 4 seconds. a) What is the initial momentum of the car? b) What is the final momentum? c) What is the change in its momentum? d) What force produced this change in the momentum of the car? 7. What is the momentum of an electron (Mo = 9.1 x 101 kg) which is moving at a speed of 2.0 x10" m/s?
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