Question

A mass of 2 kg is placed on a horizontal surface with a coefficient of kinetic friction of 0.3. A force is applied vertically downward to it and another force of 85 Newtons is applied at 18 degrees below the horizontal. As it moves 9 meters in the +x direction it loses 160 Joules of kinetic energy. What is the amount of the force which is applied downward in Newtons?

Answer #1

A mass of 10 kg is travelling over a horizontal surface with
friction and the coefficient of kinetic friction is 0.53. One
additional force of 27 Newtons is applied to it in the +x direction
(parallel to the surface). It slides 3 meters in the +x direction.
What is the work done by the weight force in Joules?

A mass of 6 kg rests on a floor with a coefficient of static
friction of 0.95 and coefficient kinetic friction of 0.30. One
force is applied vertically downward of 22 Newtons and another
force is applied at an angle of 28 degrees below the horizontal.
Calculate what the magnitude this force needs to be in order to
begin to move the mass. If that force is removed and another force
is applied at an angle of 28 degrees above...

1. A mass of 9.9 kg is resting on a horizontal surface without
friction. A force is applied vertically upward to the mass. What
does the amount of this force need to be in order to begin to pull
the mass off the surface, in Newtons?
2. A mass of 8 kg is resting on a horizontal surface without
friction. A force of 143 Newtons is applied in the +x direction, a
force of 19 Newtons is applied in the...

A box with a mass of 7.01 kg is sliding along a horizontal
surface at constant velocity. It is pulled by a horizontal force
and the coefficient of kinetic friction between the box and the
surface is 0.375.
Part (a) What is the work done, in joules, by
the pulling force as the box moves a distance of 0.495 m?
Part (b) What is the work done, in joules, by
the force of friction 33% Part (c) What is the...

A mass of 2.1 kilograms is placed on a
horizontal frictionless surface against an
uncompressed spring with spring constant 1151.5 N/m. The
inclined portion of the surface makes at an angle
of 30 degrees to the horizontal and has a coefficient of kinetic
friction of 0.27 with the mass. The mass is pushed against the
spring until it is compressed a distance 0.15 and then released.
How high (vertically), in meters, does the mass rise from the
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charged particle mass m charge q moves along horizontal surface
with coefficient of kinetic friction μ. magnetic field strength B
applied such that magnetic force acts into the surface. If initial
speed of particle is u show that time for the particle to stop is
(m/(μqB))*ln(1+quB/(mg))

Static and Kinetic Friction
A 25 kg crate is placed on a concrete surface. If the coefficient
of static friction is 0.60, how much horizontal force is needed to
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keep the crate moving at constant velocity, what is the coefficient
of kinetic friction?

A 25 kg crate is placed on a concrete surface. If the
coefficient of static friction is 0.60, how much horizontal force
is needed to push the crate from rest? If it takes a horizontal
force of 78 N to keep the crate moving at constant velocity, what
is the coefficient of kinetic friction?

A mass of 1.78 kg is initially at rest upon a horizontal
surface. An applied force of 16.4 N i then acts on
the mass. If the coefficient of kinetic friction regarding the
system is 0.479, what is the magnitude of the object's
acceleration?

A disk with a c of 1/2 about its center, has a mass of 4 kg, and
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force is applied at the edge of the disk in the -x direction
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directly to the left of the center, halfway between the center
edge, in the +y direction. Another force of 6 Newtons is applied
directly below the...

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