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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 193 times)

bobypop

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on: Jul 28, 2018
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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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

b


bobypop

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Reply #2 on: Jul 28, 2018
Thanks


14vl19

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Reply #3 on: Jul 28, 2018
Welcome :)


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