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Author Question: A 3.0-kg object moving in the positive x direction has a one-dimensional elastic collision with a ... (Read 122 times)

asmith134

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on: Jul 28, 2018
A 3.0-kg object moving in the positive x direction has a one-dimensional elastic collision with a 5.0-kg object initially at rest. After the collision the 5.0-kg object has a velocity of 6.0 m/s in the positive x direction. What was the initial speed of the 3.0 kg object?
 a. 6.0 m/s
  b. 7.0 m/s
  c. 4.5 m/s
  d. 8.0 m/s
  e. 5.5 m/s

Question 2

A 1.0-kg ball is attached to the end of a 2.5-m string to form a pendulum. This pendulum is released from rest with the string horizontal. At the lowest point in its swing when it is moving horizontally, the ball collides elastically with a 2.0-kg block initially at rest on a horizontal frictionless surface. What is the speed of the block just after the collision?
 a. 2.3 m/s
  b. 4.7 m/s
  c. 3.5 m/s
  d. 3.0 m/s
  e. 7.0 m/s


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zenzy

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

B


asmith134

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Reply 2 on: Jul 28, 2018
Wow, this really help

daiying98

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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