Question

A 7.8 kg crate is pulled 5.4 m up a 30^{o} incline by a
rope angled 19^{o} above the incline. The tension in the
rope is 120 N and the crate's coefficient of kinetic friction on
the incline is 0.24.

a) How much work is done by tension, by gravity, and by the normal force?

b) What is the increase in thermal energy of the crate and incline?

Answer #1

Sol::

Given ::

m= 7.8 kg

x = 5.4 m

Ѳ = 30°

Ѳ= 19°

Tension (T) =120 N

Coefficient of kinetic friction= 0.24.

A)

Work done by Tension

Wt = T*Δr

= T*Δx*Cos19°

= 120*5.4*(cos 19)

= 612.696 J

≈ 613 J

Work done by Gravity

Wg = F*Δr

= m*g*Δx*Cos(90+30)

= - 7.8*9.81*5.4*(sin 30)

= -206.598 J

≈ -207 J

Work done by Normal force

Wn = F(normal)*zero

= 0 J

B)

The increase in thermal energy of the crate and incline

= Work done against the force of friction

= [0.24*{7.8*9.81*(cos 30) - 120*(sin 19)}]*5.4

= 35.249 J

≈ 35.25 J

Hope this answer helps you

Please RATE my answer

Thank you

An 8.2 kg crate is pulled 5.4 m up a 30∘ incline by a rope
angled 17 ∘ above the incline. The tension in the rope is 120 N and
the crate's coefficient of kinetic friction on the incline is 0.26.
How much work is done by tension, by gravity, and by the normal
force? What is the increase in the thermal energy of the crate and
incline? NV I have figured it out I wasn't thinking normal force
was...

an 7.8 kgcrate is pulled 4.5mup a 30∘ incline by a rope angled
18∘above the incline. the tension in the rope is 110 n and the
crate's coefficient of kinetic friction on the incline is 0.23. how
much work is done by tension, by gravity, and by the normal force?
What is the increase in thermal energy of the crate and
incline?

A 8.4 kg crate is pulled 4.7 m up a 30 degree incline by a rope
angled 15 degrees above the incline. The tension in the rope is 130
N and the crate's coefficient of kinetic friction on the incline is
0.27. 1.) What is the workd done by the Normal Force?
1.) What is the work done by the Frictional force?
ANSWER: -47.7J
2.) What is the total work done on the crate?
ANSWER: 349J
3.) If the object...

A crate of mass 9.6 kg is pulled up a rough incline with an
initial speed of 1.40 m/s. The pulling force is 98 N parallel to
the incline, which makes an angle of 19.5° with the horizontal. The
coefficient of kinetic friction is 0.400, and the crate is pulled
4.98 m.
(a) How much work is done by the gravitational force on the
crate?
J
(b) Determine the increase in internal energy of the crate–incline
system owing to friction....

A crate of mass 9.6 kg is pulled up a rough incline with an
initial speed of 1.52 m/s. The pulling force is 104 N parallel to
the incline, which makes an angle of 20.4° with the horizontal. The
coefficient of kinetic friction is 0.400, and the crate is pulled
4.92 m.
(a) How much work is done by the gravitational force on the
crate?
J
(b) Determine the increase in internal energy of the crate–incline
system owing to friction....

A 6.0-kg crate is pulled up a ramp by a 50-Newton force. The
ramp makes a 30o angle with the horizontal, and the coefficient of
kinetic friction between the crate and the ramp is 0.30.
a) Draw a free body diagram
b) What is the magnitude of the kinetic frictional force?
c) What is the acceleration of the crate?

You are pulling a
heavy crate (mass m) up a ramp inclined at an angle
θ to the horizontal. The ramp is not a smooth
surface. The rope that you are pulling with is parallel to the
incline.
What forces are acting
on the crate?
Group of answer choices
Friction, gravity, normal force and tension
Gravity and tension
Friction, gravity and tension
Friction
Gravity, normal force and tension
Gravity
Normal force
Tension

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...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 8 minutes ago

asked 14 minutes ago

asked 17 minutes ago

asked 19 minutes ago

asked 33 minutes ago

asked 33 minutes ago

asked 42 minutes ago

asked 48 minutes ago

asked 49 minutes ago

asked 59 minutes ago

asked 1 hour ago

asked 1 hour ago