Question

A factory worker pushes a 30.0-kg crate a distance of 4.50 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.250.

17

(a) What magnitude of force must the worker apply? (b) How much
work is done on the crate by this force? (c) How much work is done
on the crate by friction? (d) How much work is done by the normal
force? By gravity? (e) What is the total work done

Answer #1

here,

the mass of crate , m = 30 kg

s = 4.5 m

coefficient of kinetic friction , uk = 0.25

a)

as it is moving at constant velocity

the acceleration of crate is zero

the horizontal force applied by the worker , F = uk * m * g

F = 0.25 * 30 * 9.81 N = 73.58 N

b)

the work done on the crate by this force , W1 = F * s

W1 = 73.58 * 4.5 J = 330.1 J

c)

the work done by friction force , W2 = - ff * s

W2 = - uk * m * g * s

W2 = - 0.25 * 30 * 9.81 * 4.5 J

W2 = - 330.1 J

d)

the work done by gravity , Wg = m * g * s* cos(90) = 0 J

the work done by normal force , Wn = N * s * cos(90) = 0 J

e)

the total work done , Wt = W1 + W2 + Wg+ Wn = 0 J

A factory worker pushes a 29.8 kg crate a distance of 5.0 m
along a level floor at constant velocity by pushing downward at an
angle of 30 ∘ below the horizontal. The coefficient of kinetic
friction between the crate and floor is 0.26.
1.What magnitude of force must the worker apply to move the
crate at constant velocity?
2.How much work is done on the crate by this force when the
crate is pushed a distance of 5.0 m...

A factory worker pushes a 29.8 kg crate a distance of 5.0 m
along a level floor at constant velocity by pushing downward at an
angle of 30 ∘ below the horizontal. The coefficient of kinetic
friction between the crate and floor is 0.26.
1.What magnitude of force must the worker apply to move the
crate at constant velocity?
2.How much work is done on the crate by this force when the
crate is pushed a distance of 5.0 m...

A factory worker moves a 29.0 kg crate a distance of 5.30 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.300.
a) What magnitude of force must the worker apply?
b) How much work is done on the crate by the worker's push?
c) How much work is done on the crate by friction?
d) How much work is done by the normal...

a factory worker pushes a crate of mass 28.2kg a distance of
4.70m aong a level floor at constant velocity by pushing
horizontally on it. the coefficient of kinetic friction between the
crate and the floor is .24.
A) what magnitude of the force must the wprker apply?
B) how much work is done on the crate by this force?
c)how much work is done on the crate by friction??
d)how much work is done by the normal force?
e)...

A factory worker moves a 21.0 kg crate a distance of 4.80 m
along a level floor at constant velocity by pushing horizontally on
it. The coefficient of kinetic friction between the crate and the
floor is 0.300.
What magnitude of force must the worker apply? (N)
How much work is done on the crate by the worker's push? (J)
How much work is done on the crate by friction? (J)
How much work is done by the normal force?...

A factory worker pushes a crate of mass 30.9 kg a distance of
4.10 m along a level floor at constant velocity by pushing
horizontally on it. The coefficient of kinetic friction between the
crate and floor is 0.26.
Part A)
What magnitude of force must the worker apply?
Express your answer using two significant figures.
Part B)
How much work is done on the crate by this force?
Express your answer using two significant figures.
Part C)
How much...

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...

1.)
Steve pushes a crate 20 m across a level floor at a constant speed
with a force of 200 N. The velocity of the crate is in the
direction of the force Steve is applying to the crate. How much
work is done by Steve?
2.) Steve pushes a crate 20 m across a level floor at a
constant speed with a force of 200 N. The velocity of the crate is
in the direction of the force Steve...

A worker pushes horizontally on a 600-N shipping container. The
container moves across a warehouse floor at a constant velocity of
0.8m/s. The coefficient of kinetic friction between the crate and
floor is 0.3. What is the magnitude of the worker's force in N?
PLEASE SHOW STEP BY STEP I AM SO CONFUSED

A construction worker pushes on a 10 kg crate down an inclined
plane that is 7.0 m long and is inclined at an angle of 20 degrees
to the horizontal. As a result, the crate slides down the entire
length of the plane with a constant speed of 3.0 m/s. Suppose that
the worker pushes directly on the crate in a direction parallel to
the incline with a force of 50 N for the entire length of the
plane. A)...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 8 minutes ago

asked 9 minutes ago

asked 9 minutes ago

asked 14 minutes ago

asked 16 minutes ago

asked 17 minutes ago

asked 31 minutes ago

asked 37 minutes ago

asked 39 minutes ago

asked 40 minutes ago

asked 48 minutes ago

asked 56 minutes ago