Question

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?

Answer #1

Objects with masses m1 = 12.0 kg and
m2 = 8.0 kg are connected by a light string
that passes over a frictionless pulley as in the figure below. If,
when the system starts from rest, m2 falls 1.00
m in 1.48 s, determine the coefficient of kinetic friction between
m1 and the table.
Express the friction force in terms of the coefficient of kinetic
friction. Obtain an expression for the acceleration in terms of the
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frictionless pulley. The coefficient of kinetic friction between
m1 and the horizontal surface is 0.24.
(a) What is the magnitude of the acceleration (in
m/s2) of the hanging mass?
Answer: m/s2
(b) Determine the...

(6)
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surface. It is connected via a massless string over a massless,
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(a) What is the minimum mass M1 that will remain stationary
and not slip?
(b) If this minimum mass is nudged ever so slightly, it will
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Two blocks with masses M1 and M2 are connected by a massless
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incline of 31.5° with coefficient of kinetic friction ?2 = 0.105.
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A hanging weight, with a mass of m1 = 0.370
kg, is attached by a string to a block with mass
m2 = 0.850 kg as shown in the figure below. The
string 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...

An object with mass m1 = 3.70 kg, rests on a
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Two objects labeled m1 and
m2 are attached together by a cable.
Object m1 lies on a horizontal table with
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The cable extends horizontally from the right side...

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...

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The boxes are released from rest. Calculate the work done on m1 by
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the kinetic coefficient of friction for a 12 kg mass on a
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magnitude of the acceleration of each mass and the tension in the
string

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