Question

**A block of mass m = 3.57 kg is drawn at a constant speed
of 4.06 m along a horizontal floor by a rope exerting a constant
force of 7.68 N at an angle of 15.0˚ above the horizontal.
Determine the work done on the block by the rope, the work done by
friction and the coefficient of kinetic friction between the floor
and block.**

Answer #1

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 mass m = 13 kg is pulled along a horizontal floor, with a
coefficient of kinetic friction μk = 0.07, for a
distance d = 5.1 m. Then the mass is continued to be pulled up a
frictionless incline that makes an angle θ = 33° with the
horizontal. The entire time the massless rope used to pull the
block is pulled parallel to the incline at an angle of θ = 33°
(thus on the incline it is...

A mass m = 12 kg is pulled along a horizontal floor with NO
friction for a distance d =7.2 m. Then the mass is pulled up an
incline that makes an angle θ = 30° with the horizontal and has a
coefficient of kinetic friction μk = 0.49. The entire
time the massless rope used to pull the block is pulled parallel to
the incline at an angle of θ = 30° (thus on the incline it is
parallel...

A mass m = 12 kg is pulled along a horizontal floor with NO
friction for a distance d =7.2 m. Then the mass is pulled up an
incline that makes an angle θ = 30° with the horizontal and has a
coefficient of kinetic friction μk = 0.49. The entire
time the massless rope used to pull the block is pulled parallel to
the incline at an angle of θ = 30° (thus on the incline it is
parallel...

A 6.53-kg block initially at rest is pulled to the right along a
horizontal surface by a constant force of 125 N applied at an angle
θ above the horizontal. The coefficient of kinetic friction between
the block and the horizontal surface is 0.150. At what angle θ
above the horizontal surface should the force be applied to achieve
the largest possible speed after the block has moved 5.00 m to the
right?

A 35 kg trunk is pushed 5.0 m at constant speed up a 30° incline
by a constant horizontal force. The coefficient of kinetic friction
between the trunk and the incline is 0.16. Calculate the work done
by the applied horizontal force. Calculate the work done by the
weight of the trunk. How much energy was dissipated by the
frictional force acting on the trunk? From now suppose the 50 kg
trunk is pushed 5.4 m at constant speed up...

A 16.3 kg block is dragged over a rough, horizontal surface by a
constant force of 184 N acting at an angle of angle 34.9 ? above
the horizontal. The block is displaced 44 m and the coefficient of
kinetic friction is 0.131. 16.3 kg µ = 0.131 184 N 34.9 ? Find the
work done by the 184 N force. The acceleration of gravity is 9.8
m/s 2 . Answer in units of J. 005 (part 2 of 5)...

Part 1) A 1.0 kg block is pushed 2.0 m at a constant velocity up
a vertical wall by a constant force applied at an angle of 29.0 ◦
with the horizontal, as shown in the figure. The acceleration of
gravity is 9.81 m/s 2. Drawing not to scale. If the coefficient of
kinetic friction between the block and the wall is 0.20, find a)
the work done by the force on the block. Answer in units of J.
Part...

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 2.90 kg block on a horizontal floor is attached to a
horizontal spring that is initially compressed 0.0340 m . The
spring has force constant 850 N/m . The coefficient of kinetic
friction between the floor and the block is 0.42 . The block and
spring are released from rest and the block slides along the
floor.
Part A
What is the speed of the block when it has moved a distance of
0.0190 m from its initial position?...

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