4. Consider the blocks on the inclined surface above. They are attached by a steel rod that does not bend. Suppose the mass of block m 1=15 kg and has a coefficient of kinetic friction μ_k=.2, and a coefficient of static friction μ_s=.9 and θ=42 degrees. Suppose the mass of the second block is m2=25 kg.
a. Suppose the masses are initially at rest. What is the minimum coefficient of friction of m2 required to stop both of them from sliding down the surface?
b. What's the minimum mass of m2 required to make mass m 1 slide up the ramp?
c. Suppose now that mass m 1 is sliding down with a velocity V=2 m / s. What will be the acceleration of the block if mass m 2 has a coefficient of kinetic friction μ- k=.3 (magnitude and direction)?
Homework Answers
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2. Mass mi -10.0 kg is initially held against the spring of spring constant k-100 N/m. The spring is compressed a distance x 0.45 m. When released, m is fired towards a block of mass m2-4.4 kg initially at rest at the edge of a horizontal, frictionless table of height h-0.75 m. A ramp is placed at the end of the table. The ramp has a coefficient of kinetic friction μ.-0.25 and is a distance d-1.06 m long. The blocks...
help 2. Mass mi 10.0 kg is initially held against the spring of spring constant k...
help
2. Mass mi 10.0 kg is initially held against the spring of spring constant k 100 N/m. The spring is compressed a distance x 0.45 m. When released, m, is fired towards a block of mass m 4.4 kg initially at rest at the edge of a horizontal, frictionless table of height h- 0.75 m. A ramp is placed at the end of the table. The ramp has a coefficient of kinetic friction μ-0.25 and is a distance d...
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Two blocks with masses ?1 and ?2 are connected by a massless string that passes over...
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2. Mass mi -10.0 kg is initially held against the spring of spring constant k-100 N/m. The spring is compressed a distance x 0.45 m. When released, m is fired towards a block of mass m2-4.4 kg initially at rest at the edge of a horizontal, frictionless table of height h-0.75 m. A ramp is placed at the end of the table. The ramp has a coefficient of kinetic friction μ.-0.25 and is a distance d-1.06 m long. The blocks...
help
2. Mass mi 10.0 kg is initially held against the spring of spring constant k 100 N/m. The spring is compressed a distance x 0.45 m. When released, m, is fired towards a block of mass m 4.4 kg initially at rest at the edge of a horizontal, frictionless table of height h- 0.75 m. A ramp is placed at the end of the table. The ramp has a coefficient of kinetic friction μ-0.25 and is a distance d...
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