Question

A crate of mass m1 = 15.3 kg is pulled by a massless rope up a
36.9° ramp. The rope passes over an ideal pulley and is attached to
a hanging crate of mass m2 = 16.3 kg. The crates move 1.4 m,
starting from rest.

Find the work done by gravity on the sliding crate.

A crate of mass m1 = 12.4 kg is pulled by a massless rope up a
36.9° ramp. The rope passes over an ideal pulley and is attached to
a hanging crate of mass m2 = 16.3 kg. The crates move 1.70 m,
starting from rest. If the frictional force on the sliding crate
has magnitude 21.5 N and the tension in the rope is 121.5 N, find
the total work done on the sliding crate.

The total work done on the sliding crate is

Answer #1

here,

1)

the mass of sliding crate , m1 = 15.3 kg

theta = 36.9 degree

s = 1.4 m

the work done by gravity on the sliding crate , Wg = - change in gravitational potential energy

Wg = - (m1 * g * s * sin(theta))

Wg = - 15.3 * 9.81 * 1.4 * sin(36.9)

Wg = - 126.1 J

2)

the mass of sliding crate , m1 = 12.4 kg

theta = 36.9 degree

s = 1.7 m

the tension in the rope , T = 121.5 N

frictional force , ff = 21.5 N

the total Work done on sliding crate , W = Wff + Wg + Wt

W = (- ff * s ) + ( - m1 * g * s * sin(theta) + (T * s))

W = 1.7 * ( - 21.5 - 12.4 * 9.81 * sin(36.9) + 121.5) J

W = 45.9 J

Two wooden crates rest on top of one another. The smaller top
crate has a mass of m1 = 15 kg and the larger bottom
crate has a mass of m2 = 88 kg. There is NO friction
between the crate and the floor, but the coefficient of static
friction between the two crates is μs = 0.85 and the
coefficient of kinetic friction between the two crates is
μk = 0.66. A massless rope is attached to the lower...

A mass m1 = 1 kg on a horizontal table is pulled by a string
looped over a massless frictionless pulley and attached to another
hanging mass m2. The coefficient of kinetic friction between the
table and mass m1 is 0.5 and the coefficient of static friction is
0.6.
a) What is the minimum mass m2 that will start both masses
moving?
b) What is the acceleration of the system with this minimum
mass?

Two packing crates of masses
m1 = 10.0 kg
and
m2 = 4.70 kg
are connected by a light string that passes over a frictionless
pulley as in the figure below. The 4.70-kg crate lies on a smooth
incline of angle 35.0°. Find the following.
Two crates are connected to each other by a string that passes
over a pulley, which is attached to the top corner of a wedge. The
crate of mass m1 hangs freely below the pulley....

Two blocks with masses M1 and M2 are connected by a massless
string that passes over a massless pulley as shown.
M1 has a mass of 2.25 kg and is on an incline of θ1=46.5∘ with
coefficient of kinetic friction μ1=0.205.
M2 has a mass of 6.05 kg and is on an incline of θ2=33.5∘ with
coefficient of kinetic friction μ2=0.105.
The two‑block system is in motion with the block of mass M2
sliding down the ramp.
Find the magnitude...

A m1 = 1.7 kg box is on a frictionless θ = 43 ∘ slope and is
connected via a massless string over a pulley of mass M = 1.3 kg
and radius R = 0.6 m to a hanging m2 = 9.3 kg weight. The
coefficient of kinetic friction between the ramp and m1 is 0.2.
The boxes are released from rest. Calculate the work done on m1 by
kinetic friction as m2 drops by a distance of 1.7...

A 55-kg packing crate is pulled with constant speed across a
rough floor with a rope that is at an angle of 41.0 ∘ above the
horizontal.
If the tension in the rope is 175 N , how much work is done on
the crate by the rope to move it 9.0 m ?

A
55-kg packing crate is pulled with constant speed across a rough
floor with a rope that is at an angle of 41.6 degrees above the
horizontal.
Part a:
If the tension in the rope is 165 N how much work is done on
the crate by the rope to move it 3.0 m ?
___ J

A hanging weight, with a mass of m1 = 0.355
kg, is attached by a rope to a block with mass
m2 = 0.845 kg as shown in the figure below. The
rope goes over a pulley with a mass of M = 0.350 kg. The
pulley can be modeled as a hollow cylinder with an inner radius of
R1 = 0.0200 m, and an outer radius of
R2 = 0.0300 m; the mass of the spokes is
negligible. As...

A block with mass m1 hangs from a rope that is extended over an
ideal pulley and attached to a second block with mass m2 that sits
on a ledge. The second block is also connected to a third block
with mass m3 by a second rope that hangs over a second ideal pulley
as shown in the figure below. If the friction between the ledge and
the second block is negligible, m1 = 2.60 kg, m2 = 4.00 kg,...

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...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 29 minutes ago

asked 49 minutes ago

asked 52 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 4 hours ago

asked 4 hours ago