Drop suitcase on conveyor belt. a) A stationary suitcase is placed on a moving c

Question

Drop suitcase on conveyor belt. a) A stationary suitcase is placed on a moving conveyor belt. Is the friction static or kinetic? b) The belt is moving to the right. Thus, relative to the belt, the suitcase is moving to the left, thus there is a force on the suitcase to the right. The suitcase accelerates to the right until it reaches the speed of the belt. Is the work that friction does on the suitcase positive, negative, or zero? c) After the suitcase reaches the speed of the belt, what is the horizontal component of the force acting on the suitcase?

Explanation / Answer

a) Kinetic (as suitcase is accelerating)

b) negative (friction always does a negative work)

c) Zero (constant speed = zero force)

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