SOLUTION: With a force of 15 N, a person is pushing a 30 kg crate over a horizontal surface. Suppose the crate is moving at a constant velocity. a. What is the force of friction? b

Question 157529: With a force of 15 N, a person is pushing a 30 kg crate over a horizontal surface. Suppose the crate is moving at a constant velocity.
a. What is the force of friction?

b. What is the acceleration of the crate?

c. Suppose the person lets go of the crate. What is the new acceleration that initially occurs right after the crate is let go?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
A)15 N. You are precisely balancing the frictional force with your push.
B)Acceleration is zero because velocity is constant.
C)Without you providing the 15N in the forward direction, an immediate force of 15N, from dynamic friction, will arise in the reverse direction (opposite to the direction of motion).

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