Question

A box of mass 730 kg is being pulled at a constant speed across
a rough horizontal floor by a constant force, *F*. The angle
of this force above the horizontal is such that the force you apply
is a minimum (that is, the amount of force you need to move the box
at a constant speed across the floor depends on the angle at which
you pull - find the angle which the force is a minimum). Calculate
the amount of work done in moving the box a distance 10 meters
across the floor with this minimum force. The coefficient of
kinetic friction between the box and the floor is 0.150.

Answer #1

A box with mass 1.74 kg is being pulled across a rough surface
at a constant speed with a coefficient of kinetic friction
µk = 0.366. The pulling force has a magnitude of 11.2 N
and is directed at an angle 32.8 degrees above horizontal. If the
box is dragged a distance of 10.3 m, what is the total energy lost
to friction? (Hint: be sure to account for the upward component of
the pulling force, and note that the...

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
55-kg packing crate is pulled with constant speed across a rough
floor with a rope that is at an angle of 41.6 degrees above the
horizontal.
Part a:
If the tension in the rope is 165 N how much work is done on
the crate by the rope to move it 3.0 m ?
___ J

A
box kg meters with constant speed on a rough inclined plane whose
surface is 30 ° with the horizontal. What is the magnitude of the
work done by the friction force?
A
box of mass M = 5 kg slides 10 meters with constant speed on a
rough inclined plane whose surface is 30 ° with the horizontal.
What is the magnitude of the work done by the friction force?

A crate of mass 9.6 kg is pulled up a rough incline with an
initial speed of 1.40 m/s. The pulling force is 98 N parallel to
the incline, which makes an angle of 19.5° with the horizontal. The
coefficient of kinetic friction is 0.400, and the crate is pulled
4.98 m.
(a) How much work is done by the gravitational force on the
crate?
J
(b) Determine the increase in internal energy of the crate–incline
system owing to friction....

A crate of mass 9.6 kg is pulled up a rough incline with an
initial speed of 1.52 m/s. The pulling force is 104 N parallel to
the incline, which makes an angle of 20.4° with the horizontal. The
coefficient of kinetic friction is 0.400, and the crate is pulled
4.92 m.
(a) How much work is done by the gravitational force on the
crate?
J
(b) Determine the increase in internal energy of the crate–incline
system owing to friction....

consider a cart being pulled across a frictionless surface at
constant speed using force applied at angle theta 0 above
horizontal. which is true and why
NF is equal to weight of box
pulling is less than friction force
NF is less than weight of box
Pulling force is equal to friction force
NF is larger than weight of box

A box is pulled a distance 5 meters across the floor by a 40 N
force F which makes an angle 45 degrees with the horizontal. Find
work done by the force. (b) If magnitude of the force was kept
constant but the angle was increased to 60 degrees, find the work
done by the force. Compare your results found in (a) and (b)? Draw
clear force diagram. SHOW WORK

An initially stationary box of sand is to be pulled across a
floor by means of a cable in which the tension should not exceed
883 N. The coefficient of static friction between the box and the
floor is 0.360. (a) What should be the angle
between the cable and the horizontal in order to pull the greatest
possible amount of sand, and (b) what is the
weight of the sand and box in that situation?

18.
A 34.5 kg box initially at rest is pushed 5.75 m along a rough,
horizontal floor with a constant applied horizontal force of 150 N.
If the coefficient of friction between box and floor is 0.300, find
the following.
(a) the work done by the applied force
___J
(b) the increase in internal energy in the box-floor system due to
friction
___J
(c) the work done by the normal force
___J
(d) the work done by the gravitational force...

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