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Author Question: A 120-g rubber ball is thrown with a speed of 10 m/s at an oncoming 900-kg car which is approaching ... (Read 125 times)

haleyc112

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on: Jul 29, 2018
A 120-g rubber ball is thrown with a speed of 10 m/s at an oncoming 900-kg car which is approaching at 30 m/s, and undergoes a one-dimensional elastic collision with the car. What is the speed of the ball after the collision?
 
  A) 10 m/s
  B) 30 m/s
  C) 40 m/s
  D) 50 m/s
  E) 70 m/s

Question 2

The rest mass of a photon is zero kg.
 
  Indicate whether the statement is true or false


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ebe

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Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

TRUE


haleyc112

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

patma1981

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Reply 3 on: Yesterday
Excellent

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