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Author Question: Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 ... (Read 157 times)

jjjetplane

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on: Jul 28, 2018
Alex throws a 0.15-kg rubber ball down onto the floor. The ball's speed just before impact is 6.5 m/s and just after is 3.5 m/s. If the ball is in contact with the floor for 0.050 s, what is the magnitude of the average force applied by the floor on the ball?
 a. 60 N
  c. 30 N
  b. 133 N
  d. 3.5 N

Question 2

A proton initially moves left to right long the x axis at a speed of 2.00  103 m/s. It moves into an electric field, which points in the negative x direction, and travels a distance of 0.300 m before coming to rest. If the proton's mass and charge are 1.67  10-27 kg and 1.60  10-19 C, respectively, what is the magnitude of the electric field?
 a. 13.9 N/C
  c. 28.3 N/C
  b. 0.0696 N/C
  d. 0.104 N/C


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gstein359

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

C

Answer to Question 2

B


jjjetplane

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Reply #2 on: Jul 28, 2018
TY


gstein359

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Reply #3 on: Jul 28, 2018
You're welcome


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