Solving Friction Problems on an Incline: A Cal-Trig Guide

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Understanding friction on an incline involves calculating the forces acting on an object, such as gravity, friction, and the normal force. For a 4.33 kg block sliding down a 25.8-degree incline with a coefficient of kinetic friction of 0.481, the work done by gravity, friction, and the normal force needs to be determined. A free body diagram is essential for visualizing these forces and their interactions. The frictional force can be calculated using the formula F_friction = μN, where N is the normal force. Properly applying these principles will clarify the relationship between friction and motion on an incline.
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I am having real problems understanding friction and how it relates to problems. Right now all I have to work with is a Cal-oriented book, but the class I'm in is taught with just Trig. I am completely lost. Your help would be greatly appreciated.

Starting from rest, a 4.33 kg block slides 2.82 m down a rough 25.8 degree incline. The coeficient of kinetic friction between the block and the incline is 0.481. The acceleration of gravity is 9.8 m/s2.

a.) Find the work done by the force of gravity. Answer in units of J.
b.) Find the work done by the friction force between block and incline. Answer in units of J.
c.) Find the work done by the normal force. Answer in units of J.
 
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Well, what have you done??

Did you draw the free body diagram?
 
Yupp - cyclovenom said it - Draw a free diagram - label all the forces, including the normal force and the force parallel to the surface.

Remember from the last problem I helped u with that

F_{friction} = \mu N
 

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