Question

A boy is pushing a 60 kg box along the floor by applying a
horizontal force of 150N. The box is accelerating at a rate of 0.5
m/s^{2}. What is the coefficient of kinetic friction
between the box and the floor?

Answer #1

A factory worker exerts a 100 N horizontal pushing force on a
70.0 kg box that is initially at rest on the floor. The coefficient
of static friction is 0.2 and the coefficient of kinetic friction
is 0.1. The force of friction acting on the box is equal to:

A 36.5 kg box initially at rest is pushed 4.25 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
J...

Mary applies a force of 75 N to push a box with an acceleration
of 0.43 m/s2. When she increases the pushing force to 81 N, the
box's acceleration changes to 0.63 m/s2. There is a constant
friction force present between the floor and the box. (a) What is
the mass of the box? kg (b) What is the coefficient of kinetic
friction between the floor and the box?
(a) What is the mass of the box?
_________kg
(b) What...

A boy exerts a horizontal force of 119 N on a box with a mass of
30.7 kg.
(a)
If the box doesn't move, what's the magnitude of the static
friction force (in N)?
N
(b)
What is the minimum possible value of the coefficient of static
friction between the box and the floor? (Assume the box remains
stationary.)

A man of 75 kg is pushing a heavy box along flat floor. The
coefficient of sliding friction between the floor and the box is
0.20, and the coefficient of static friction between the man's
shoes and the floor is 0.80.
(a) If the man pushes downward on the box at an angle of 30
degrees, what is the maximum mass of the box he can move?
(b)If the man pushes upward on the box at an angle of 30...

A boy is pulling a toy box across a horizontal rough surface. If
his pulling force is 60 Newton, what is the acceleration of the
box, given that mass of the box m = 18 kg, the angle of his force
with respect to the horizontal θ = 20°, that the kinetic
frictional coefficient between the box and the surface
μk = 0.15

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...

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...

You find that it takes a horizontal force of 167 NN to slide a
box along the surface of a level floor at constant speed. The
coefficient of static friction is 0.51, and the coefficient of
kinetic friction is 0.38.If you place the box on a dolly of mass
5.9 kgkg and with coefficient of rolling friction
1.6×10−2, what horizontal acceleration would that 167 NN
force provide?

A
7.00-kg box sits on a ramp that is inclined at 36.3 ∘ above the
horizontal. The coefficient of kinetic friction between the box and
the ramp is 0.31.
What horizontal force is required to move the box up the
incline with a constant acceleration of
4.30 m/s2 ?

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