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Author Question: A 1000-kg truck moving at 10 m/s that brakes to a stop in 5 s has an average braking force of A) ... (Read 51 times)

vinney12

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on: Jul 29, 2018
A 1000-kg truck moving at 10 m/s that brakes to a stop in 5 s has an average braking force of
 
  A) 1000 N.
  B) 2000 N.
  C) 3000 N.
  D) 4000 N.
  E) 5000 N.

Question 2

You hold a 5-newton rock motionless in your hand. Regarding the forces on this rock,
 
  A) the net force on the rock is zero.
  B) the downward force of gravity is balanced by the upward force of air resistance.
  C) there are no forces of any kind acting on the rock, because it is not moving.
  D) the net force on the rock is 5 newtons, directed downward.
  E) the net force on the rock is 5 newtons, directed upward.


scottmt

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

Answer: B

Answer to Question 2

A


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