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A Crate slides down a Ramp - Friction and Work

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A 50 kg crate slides down a 6 m ramp inclined at an angle of 35 degrees to the horizontal. A worker pushes on the crate parallel to the ramp so that it slides down with a constant velocity. If the coefficient of kinetic friction is .33

a) Write equations of motion for the system

b) Solve for the force exerted by the worker and compute the work done by the worker

c) Compute the force of kinetic friction and find the work done by kinetic friction

d) How much work is done by gravity?

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A 50 kg crate slides down a 6 m ramp inclined at an angle of 35 degrees to the horizontal. A worker pushes on the crate parallel to the ramp so that it slides down with a constant velocity. If the coefficient of kinetic friction is .33

a) write equations of motion for the system

b) solve for the force exerted by the worker and compute the work done by the worker

c) compute the force of kinetic ...

Solution Summary

A detailed step-by-step solution provided for all the four questions regarding friction and work.

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See Also This Related BrainMass Solution

Friction and Temperature Change Problem

A crate of fruit with a mass of 35.0 kg and a specific heat capacity of 3800 J/kg.K slides 8.30m down a ramp inclined at an angle of 40.0 degrees below the horizontal (acceleration due to gravity is 9.81m/s^2).

If the crate was at rest at the top of the incline and has a speed of 2.40m/s at the bottom, the work (W_f) done on the crate, by friction is -1730J (The frictional force opposes the motion of the crate, so the work done on the crate by friction must be a negative quantity).

If an amount of heat equal to the magnitude of the work done by friction is absorbed by the crate of fruit and the fruit reaches a uniform final temperature, what is its temperature change ("deltaT") ?

"deltaT" = ___________________________________________ oC

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