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Author Question: A suitcase is sitting on a horizontal conveyor belt, which is moving at speed v. The work done by ... (Read 194 times)

bobypop

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A suitcase is sitting on a horizontal conveyor belt, which is moving at speed v. The work done by the frictional force on the suitcase is
 a. positive.
 b. negative.
 c. zero.
 d. impossible to determine without knowing the mass of the suitcase.

Question 2

A box slides across a floor and comes to rest. The work done by the frictional force on the box is
 a. positive.
 b. negative.
 c. zero.
 d. impossible to determine without knowing the coefficient of friction.



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14vl19

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Answer to Question 1

a

Answer to Question 2

b





 

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