Question

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?

Answer #1

A 6.0-kg block initially at rest is pulled to the right along a
horizontal surface with a force of 12 N. The force of kinetic
friction is 3N.
a. Draw a free-body diagram of the situation.
b. Find the work done by the 12 N force on the block to move the
block 3m?
c. Find the work done by the force of friction on the block when
the block was moved 3m?
d. Use the work-energy principle to find...

An 8.0 kg block initially at rest is pulled to the right by a 12
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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 0.400kg0.400kg block is initially at rest on a
horizontal surface, and is attached to an initially unstreteched
spring with a force constant of 2.00N/m2.00N/m. The coefficient of
kinetic friction between the block and the surface is 0.4000.400. A
constant force of 2.30N2.30N to the right is applied to the
block.
(A) Draw a free body diagram showing all forces on the block as
it moves to the right.
Determine
(B) the initial Kinetic Energy of the block: J,
and
(C)...

A 0.400kg0.400kg block is initially at rest on a
horizontal surface, and is attached to an initially unstreteched
spring with a force constant of 2.00N/m2.00N/m. The coefficient of
kinetic friction between the block and the surface is 0.4000.400. A
constant force of 2.30N2.30N to the right is applied to the
block.
(A) Draw a free body diagram showing all forces on the block as
it moves to the right.
Determine
(B) the initial Kinetic Energy of the block: J,
and
(C)...

A 4.82 kg block located on a horizontal frictionless floor is
pulled by a cord that exerts a force F=12.4N at an angle
theta=25.0degrees above the horizontal, as shown. What is the
magnitude of the acceleration of the block when the force is
applied?
What is the horizontal speed of the block 4.30 seconds after it
starts moving?
What is the magnitude of the normal force acting on the block
when the force F is acting on it?
If, instead,...

6. A 10-kg block on a horizontal surface with a coefficient of
friction of .5. It is attached to a light spring (force constant
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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?

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