Question

A 340kg piano slides 3.8 m down a 29 degrees incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.30.

Part A.

Calculate the force exerted by the man in N.

Part B.

Calculate the work done by the man on the piano.

Part C.

Calculate the work done by the friction force.

Part D.

Calculate the work done by the force of gravity.

Part E.

Calculate the net work done on the piano.

Answer #1

A 290 kg piano slides 4.3 m down a 30 degree incline and is kept
from accelerating by a man who is pushing back on it parallel to
the incline. The effective coefficient of kinetic friction is
0.40.
(a) Calculate the force exerted by the man (N).
(b) Calculate the work done by the man on the piano. (J).
(c) Calculate the work done by the friction force (J).
(d) What is the work done by the force of gravity...

A
370 kg piano slides 2.5 m down a 28° incline and is kept from
accelerating by a man who is pushing back on it parallel to the
incline. Determine: (a) the force exerted by the man (b) The work
done on the piano by the man, (c) the work done on the piano by the
force of gravity and (d) the net work done on the piano. Ignore
friction.

Starting from rest, a 2.97 kg block slides 2.44 m down a rough
39.4 ◦ incline. The coefficient of kinetic friction between the
block and the incline is 0.471. The acceleration of gravity is 9.8
m/s 2 .
1)Find the work done by the force of gravity. Answer in units of
J.
2)Find the work done by the friction force between block and
incline. Answer in units of J.
3)Find the work done by the normal force. Answer in units...

Starting from rest, a 4.30-kg block slides 1.80 m down a rough
30.0° incline. The coefficient of kinetic friction between the
block and the incline is ?k = 0.436.
(a) Determine the work done by the force of gravity. J
(b) Determine the work done by the friction force between block
and incline. J
(c) Determine the work done by the normal force. J
(d) Qualitatively, how would the answers change if a shorter
ramp at a steeper angle were...

A 5.0-kg package slides 4 m down the incline of a ramp sloped at
20˚. The coefficient of kinetic friction increases linearly along
the surface of the ramp, from 0 at the top to 0.32 at the
bottom.
1) Calculate the work done on the package by gravity.
2) Calculate the work done on the package by friction.
3) Calculate the work done on the package by the normal
force.
4) If the package had a speed of 3.7 m/s...

A 3.0 kg block slides down an incline that makes an angle ? =
30?The coefficient of kinetic friction between the block and the
incline is ?k = 0.3 If the incline is 3 m long:
1. Determine the work done by friction
2. Determine the work done by the normal force
3. Determine the work done by gravity
4. What is the total work done on the block?
5. If the block is given an initial speed of 5...

A 79.0-kg skier starts from rest and slides down a 36.0-m
frictionless slope that is inclined at an angle of 15.0° with the
horizontal. Ignore air resistance.
(a) Calculate the work done by gravity on the skier and the work
done by the normal force on the skier. Work done by gravity? Work
done by normal force?
(b) If the slope is not frictionless so that the skier has a
final velocity of 4 m/s, calculate the work done by...

starting at rest, a mass of 2.50 kg slides down an incline of
65.0 degrees. If the coefficient of kinetic friction is know to be
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An
8.20 kg package in a mail-sorting room slides 1.90 m down a chute
that is inclined at 53.6 degrees below the horizontal. The
coefficient of kinetic friction between the package and the chute's
surface is 0.35.
Calculate the works done on the package by friction (J).
Calculate the work done on the package by gravity (J).
Calculate the work done on the package by the normal force
(J).
What is the net work done on the package (J)?

A block of mass 4.0Kg slides
down an incline plane of length 10 meters that makes an angle of 30
degrees with the horizontal. The coefficient of kinetic friction
between the block and the incline is 0.3. If the block is has an
initial speed of 2mis down the incline at the top of the incline,
then what is the speed at the bottom? Show calculations. Indicate
answer.
In the previous problem, what
was the gain in Kinetic Energy? Show...

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