1 1. A 5-kg mass moving to the right at a speed of 10 m/s collides with anunknown 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 unknownmass.2. A 200-g ball moving toward the right at a speed of 30 cm/sstrikes a 400-gball moving toward the left at an unknown speed, v. After collision they sticktogether and remain motionless. Find the speed of the 400-g ball before thecollision.3. A 3-kg block moving 4 m/s to the right collides with an 8-kg block moving 2m/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 1m/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 velocityof 20 m/s? b) How long must an 88-N force act on the jeepney to support thatmomentum?5. How long must a force of 100 N act on a 20-kg rocket to increase its speed from100 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 theinitial momentum of the car? b) What is the final momentum? c) What is thechange in its momentum? d) What force produced this change in the momentumof the car?7. What is the momentum of an electron (Mo = 9.1 x 101 kg) which is moving at aspeed of 2.0 x10" m/s?

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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 = 0m/s. Find the unknown mass.

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 = 0m/s. Find the unknown mass.

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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Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.

Question

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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