Question

A worker pushes a 27.0kg crate a distance 9.50m along a level floor at constant speed by exerting a pushing force on the crate which is directed 35.0◦ below the horizontal. The coefficient of kinetic friction is 0.230. (a) How much work did the worker do on the crate? Now the worker pushes the same crate up a 35.0◦ incline at constant speed, with the same kinetic friction coefficient. This time the worker pushes horizontally on the crate. Over the same distance of 9.50 m, how much work is done by (b) the worker, (c) the force of gravity, (d) the normal force of the incline, and (e) the force of friction?

Answer #1

A factory worker pushes a 30.0-kg crate a distance of 4.50 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.250.
17
(a) What magnitude of force must the worker apply? (b) How much
work is done on the crate by this force? (c) How much work is done
on the crate by friction? (d) How much work is done by the normal
force?...

A factory worker pushes a 29.8 kg crate a distance of 5.0 m
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1.What magnitude of force must the worker apply to move the
crate at constant velocity?
2.How much work is done on the crate by this force when the
crate is pushed a distance of 5.0 m...

A factory worker pushes a 29.8 kg crate a distance of 5.0 m
along a level floor at constant velocity by pushing downward at an
angle of 30 ∘ below the horizontal. The coefficient of kinetic
friction between the crate and floor is 0.26.
1.What magnitude of force must the worker apply to move the
crate at constant velocity?
2.How much work is done on the crate by this force when the
crate is pushed a distance of 5.0 m...

a factory worker pushes a crate of mass 28.2kg a distance of
4.70m aong a level floor at constant velocity by pushing
horizontally on it. the coefficient of kinetic friction between the
crate and the floor is .24.
A) what magnitude of the force must the wprker apply?
B) how much work is done on the crate by this force?
c)how much work is done on the crate by friction??
d)how much work is done by the normal force?
e)...

A factory worker moves a 29.0 kg crate a distance of 5.30 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.300.
a) What magnitude of force must the worker apply?
b) How much work is done on the crate by the worker's push?
c) How much work is done on the crate by friction?
d) How much work is done by the normal...

A factory worker pushes a crate of mass 30.9 kg a distance of
4.10 m along a level floor at constant velocity by pushing
horizontally on it. The coefficient of kinetic friction between the
crate and floor is 0.26.
Part A)
What magnitude of force must the worker apply?
Express your answer using two significant figures.
Part B)
How much work is done on the crate by this force?
Express your answer using two significant figures.
Part C)
How much...

A factory worker moves a 21.0 kg crate a distance of 4.80 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.300.
What magnitude of force must the worker apply? (N)
How much work is done on the crate by the worker's push? (J)
How much work is done on the crate by friction? (J)
How much work is done by the normal force?...

1.)
Steve pushes a crate 20 m across a level floor at a constant speed
with a force of 200 N. The velocity of the crate is in the
direction of the force Steve is applying to the crate. How much
work is done by Steve?
2.) Steve pushes a crate 20 m across a level floor at a
constant speed with a force of 200 N. The velocity of the crate is
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A construction worker pushes on a 10 kg crate down an inclined
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A worker pushed a 36.0 kg block 6.60 m along a level floor at
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the coefficient of kinetic friction between block and floor was
0.400, what were (a) the work done by the worker's
force and (b) the increase in thermal energy of
the block-floor system?

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