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A 28.5 kg block is being pulled by a force F = 245 N up along...

A 28.5 kg block is being pulled by a force F = 245 N up along a rough incline. The coefficient of kinetic friction between the block and the incline is μk = 0.30. The block is pulled through a distace of 21.0 m. Angle is 33 degrees.

(a) Solve for the magnitude of the normal force FN (in Newtons)? Calculate the work (in Joules) done by the normal force. Pay attention to the angle in the work formula and the sign of work.

(b) What is the magnitude of the kinetic frictional force (in Newtons)? Calculate the work (in Joules) done by the kinetic frictional force. Pay attention to the angle in the work formula and the sign of work.

(c) Calculate the work (in Joules) done by the pulling force F. Pay attention to the angle in the work formula and the sign of work.

(d) The block starts from rest at the bottom of the incline. After it is pulled through a distance of 21.0 m up along the incline, what is its vertical height (in meters), hf? What is its speed (in m/s) after being pulled through 21.0 m?

(e) Add up the works (in Joules) done by all NONCONSERVATIVE Forces:

(e)

Solutions

Expert Solution

genius_generous answered 2 months ago
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