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Samantha pushes a 50-N crate up a ramp 25.0 m in length and inclined at 10 °\degree with the horizontal.What potential energy change does the crate experience?


A) 13 J
B) 55 J
C) 120 J
D) 220 J

E) A) and B)
F) A) and C)

Correct Answer

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The work done by static friction can be:


A) positive.
B) negative.
C) zero.
D) Any of the above.

E) A) and C)
F) None of the above

Correct Answer

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