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Author Question: Suppose a ball is thrown straight up, reaches a maximum height, then falls to its initial height. ... (Read 132 times)

cool

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on: Jul 29, 2018
Suppose a ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is going up.
 
  A) Both its velocity and its acceleration point upward.
  B) Its velocity points upward and its acceleration points downward.
  C) Its velocity points downward and its acceleration points upward.
  D) Both its velocity and its acceleration points downward.
  E) Neither velocity nor acceleration can be determined without additional information.

Question 2

Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. When they hit the ground
 
  A) both of them will have the same kinetic energy.
  B) the heavier one will have twice the kinetic energy of the lighter one.
  C) the heavier one will have four times the kinetic energy of the lighter one.
  D) the heavier one will have times the kinetic energy of the lighter one.


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okolip

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

B

Answer to Question 2

B


cool

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Reply 2 on: Jul 29, 2018
Gracias!

atrochim

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Reply 3 on: Yesterday
Excellent

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