Question

To pull a 36 kg crate across a horizontal frictionless floor, a
worker applies a force of 230 N, directed 18° above the horizontal.
As the crate moves 1.6 m, what work is done on the crate by
**(a)** the worker's force, **(b)** the
gravitational force on the crate, and **(c)** the
normal force on the crate from the floor? **(d)** What
is the total work done on the crate?

Answer #1

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?...

A 110-kg crate, starting from rest, is pulled across a floor
with a constant horizontal force of 380 N . For the first 14 m the
floor is frictionless, and for the next 14 m the coefficient of
friction is 0.35.
What is the final speed of the crate?

A 91 kg crate, starting from rest, is pulled across a floor with
a constant horizontal force of 400 N . For the first 15 m the floor
is frictionless, and for the next 15 m the coefficient of friction
is 0.20.
What is the final speed of the crate?
Express your answer using two significant figures.

A tension force of 155 N inclined at 35.0° above the horizontal
is used to pull a 27.0 kg packing crate a distance of 4.60 m on a
rough surface. If the crate moves at a constant speed, find (a) the
work done by the tension force and (b) the coefficient of kinetic
friction between the crate and surface.
(a) the work done by the tension force (in J)
(b)the coefficient of kinetic friction between the crate and
surface

A tension force of 165 N inclined at 25.0° above the horizontal
is used to pull a 31.0 kg shipping crate a distance of 5.10 m on a
rough surface. If the crate moves at a constant speed, find (a) the
work done by the tension force and (b) the coefficient of kinetic
friction between the crate and surface.
(a)
the work done by the tension force (in J)
J
(b)
the coefficient of kinetic friction between the crate and...

A rope that is directed 30° above the horizontal, is exerting a
10.0-N force to pull a 5.0-kg block at constant speed along a 5.0-m
horizontal floor. After drawing the free-body diagram find:
the magnitude of the normal force from the floor on the block
the magnitude of the force of friction
the work done by the rope's force
the increase in the thermal energy of the block-floor system
the coefficient of kinetic friction between the block and
floor.

A 55-kg packing crate is pulled with constant speed across a
rough floor with a rope that is at an angle of 41.0 ∘ above the
horizontal.
If the tension in the rope is 175 N , how much work is done on
the crate by the rope to move it 9.0 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 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...

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...

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