Question

Two blocks are connected by a massless string that runs across a frictionless pulley with a mass of 5.00 kg and a radius of 10.0 cm. The first block with an unknown mass of m1 sits on a horizontal surface and is also connected to a spring with a spring constant of k = 250 N/m. The coefficient of kinetic friction between the first block and the surface is 0.400. The second block with a mass of m2 = 6.00 kg hangs off the edge of the surface. Initially both blocks are at rest and the spring is at its equilibrium position. After you let the blocks go, both blocks are moving with a speed of 0.200 m/s after block 2 has fallen 10.0 cm. What is the mass of the first block?

Answer #1

A 4.00 kg block hangs by a light string that passes over a
massless, frictionless pulley and is connected to a 6.00 kg block
that rests on a frictionless shelf. The 6.00 kg block is pushed
agaisnt a spring to which it is not attached. THe spring has a
spring constant of 180 N/m , and it is compressed by 30.0cm. Find
the speed of the block after the spring is released and the 4.00 kg
block has fallen a...

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see if you can apply energy ideas instead. Use g = 10
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blocks of masses of 2.00 kg and 4.00 kg are connected by a massless
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mass is connected to a spring of k=250 N/m and the far end of the
spring is tied to a fixed point. The system is release from rest
with the spring at its relaxed length.
A.) what is the speed of...

Two blocks are attached to opposite ends of a string that passes
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Two masses are connected by a massless string and a frictionless
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Two blocks (m1=5.5kg, m2=7.2kg
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as shown in the Figure. The first block with mass
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plane when the system is released. The inclined plane makes an
angle θ = 310 with the
horizontal and the kinetic friction coefficient between the
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=0.35. Take g=10m/s2 Find
the speed of the block with mass m2 after it travels
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In the figure, the two blocks are attached by a massless rope
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