1. Starting from rest a block of mass m is pushed up a frictionless slope of angle 0 by a horizontal force of magnitude F. h F m a. Draw a free body diagram for mass m. b. What work is done on the block? Write down the work-kinetic energy theorem ( eq. 9.13) for the block and simplify. c. What forces act on the block? Write down the work done by these forces using your free-body diagram and eq. 9.17

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Chapter5: Energy
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Problem 40P: (a) A block with a mass m is pulled along a horizontal surface for a distance x by a constant force...
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Solve a,b and c

1. Starting from rest a block of mass m is pushed up a frictionless slope of angle 0 by
a horizontal force of magnitude F.
h
F
m
a. Draw a free body diagram for mass m.
b. What work is done on the block? Write down the work-kinetic energy theorem (
eq. 9.13) for the block and simplify.
c. What forces act on the block? Write down the work done by these forces using
your free-body diagram and eq. 9.17
eq.
d. Using work and energy, find a symbolic expression for the block's speed when it is
at height h above the bottom of the slope.
20°, what is the speed of the block at
e. If F= 25.0 N, m= 5.0 kg, h= 2.0 m and 0 =
the top of the slope? What happens in the limit at h → 0? Does this make sense?
Transcribed Image Text:1. Starting from rest a block of mass m is pushed up a frictionless slope of angle 0 by a horizontal force of magnitude F. h F m a. Draw a free body diagram for mass m. b. What work is done on the block? Write down the work-kinetic energy theorem ( eq. 9.13) for the block and simplify. c. What forces act on the block? Write down the work done by these forces using your free-body diagram and eq. 9.17 eq. d. Using work and energy, find a symbolic expression for the block's speed when it is at height h above the bottom of the slope. 20°, what is the speed of the block at e. If F= 25.0 N, m= 5.0 kg, h= 2.0 m and 0 = the top of the slope? What happens in the limit at h → 0? Does this make sense?
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