   Chapter 5.2, Problem 5.2QQ

Chapter
Section
Textbook Problem

A block slides at constant speed down a ramp while acted on by three forces: its weight, the normal force, and kinetic friction. Respond to each statement, true or false. (a) The combined net work done by all three forces on the block equals zero. (b) Each force does zero work on the block as it slides. (c) Each force does negative work on the block as it slides.

(a)

To determine

To say True or False: The combined net work done by all three forces on the block equals to zero.

Explanation
according to work energy theorem, the net work done on an object is equal to the change in kinetic energy of the object. The kinetic energy of the object varies with the speed of the object...

(b)

To determine

To say True or False: Each force does zero work on the block as its sides.

(c)

To determine

To say True or False: Each force does negative work on the block as its sides.

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