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Author Question: When a ball is thrown straight up with no air resistance, the acceleration at its highest point ... (Read 88 times)

APUS57

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on: Jul 29, 2018
When a ball is thrown straight up with no air resistance, the acceleration at its highest point
 
  A) is upward.
  B) is downward.
  C) is zero.
  D) reverses from upward to downward.
  E) reverses from downward to upward.

Question 2

Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth.
 
  Hans is holding a pencil at an angle of 30 with the direction of travel, as seen by Hans. What angle does the pencil make with the direction of travel, as seen by Brian on Earth?
  A) 29
  B) 30
  C) 31
  D) 33
  E) 90


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yuyiding

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

B

Answer to Question 2

C


APUS57

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

meganmoser117

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Reply 3 on: Yesterday
Gracias!

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