8. Martha, whose mass is 42 kg is traveling on her roller blades at 8 m/s, when she collides with Juan, who is also on roller blades, at rest, and has a mass of 60 kg. Assuming that Martha and Juan move together after they collide, what is their velocity after the collision? 9. A 20 kg suitcase is thrown from the top of a 20 meter building with a speed of 8 m/s. a) With what speed will it reach the ground? b) What speed does the suitcase have when it is 5 m above the ground? (Hint: note the suitcase initially has both PE and KE.) (a)
8. Martha, whose mass is 42 kg is traveling on her roller blades at 8 m/s, when she collides with Juan, who is also on roller blades, at rest, and has a mass of 60 kg. Assuming that Martha and Juan move together after they collide, what is their velocity after the collision? 9. A 20 kg suitcase is thrown from the top of a 20 meter building with a speed of 8 m/s. a) With what speed will it reach the ground? b) What speed does the suitcase have when it is 5 m above the ground? (Hint: note the suitcase initially has both PE and KE.) (a)
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter9: Momentum And Its Conservation
Section: Chapter Questions
Problem 77A
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Question
![8. Martha, whose mass is 42 kg is traveling on her roller blades at 8 m/s, when she
collides with Juan, who is also on roller blades, at rest, and has a mass of 60 kg.
Assuming that Martha and Juan move together after they collide, what is their velocity
after the collision?
9. A 20 kg suitcase is thrown from the top of a 20 meter building with a speed of 8 m/s.
a) With what speed will it reach the ground?
b) What speed does the suitcase have when it is 5 m above the ground?
(Hint: note the suitcase initially has both PE and KE.)
(9)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa36c4402-c739-4688-a1cf-5f69cb271f99%2Fda0623b9-3e56-4dd4-be57-6aba3aebb91d%2Fqy2ifbl_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8. Martha, whose mass is 42 kg is traveling on her roller blades at 8 m/s, when she
collides with Juan, who is also on roller blades, at rest, and has a mass of 60 kg.
Assuming that Martha and Juan move together after they collide, what is their velocity
after the collision?
9. A 20 kg suitcase is thrown from the top of a 20 meter building with a speed of 8 m/s.
a) With what speed will it reach the ground?
b) What speed does the suitcase have when it is 5 m above the ground?
(Hint: note the suitcase initially has both PE and KE.)
(9)
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