4. The potential energy of a box on a shelf, relative to the floor, is a measure of a the work done putting the box on the shelf from the floor. b. the weight of the box times the distance above the floor. S, the energy the box has, because of its position above the floor. d any of these.
4. The potential energy of a box on a shelf, relative to the floor, is a measure of a the work done putting the box on the shelf from the floor. b. the weight of the box times the distance above the floor. S, the energy the box has, because of its position above the floor. d any of these.
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Transcribed Image Text:_4. The potential energy of a box on a shelf, relative to the floor, is a measure of
a the work done putting the box on the shelf from the floor.
k. the weight of the box times the distance above the floor.
& the energy the box has, because of its position above the floor.
d any of these.
5. A 0.3 kg ball is released in an inclined plane as shown in the figure below. In order for it to stop at point B, what
is the magnitude of the kinetic friction force?
a.
A
b. 0.66 N
C.
-0.66 N
d. 8.82 N
5 m
12 m
350
250
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