Starting from rest, a 5.0 kg block slides3 m down a rough 30.0° incline. Thecoef

Question

Starting from rest, a 5.0 kg block slides3 m down a rough 30.0° incline. Thecoefficient of kinetic friction between the block and the inclineis µk = 0.436. (a) Determine the work done by the force ofgravity.
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(b) Determine the work done by the friction force between block andincline.
J
(c) Determine the work done by the normal force.
J (a) Determine the work done by the force ofgravity.
J
(b) Determine the work done by the friction force between block andincline.
J
(c) Determine the work done by the normal force.
J

Explanation / Answer

mass m = 5 kg distance S = 3 m angle = 30 degrees (a).  the work done by the force of gravity = m gsin * S (b). the work done by the friction force between block andincline = f S where f = frictional force = mg cos where = The coefficient of kinetic friction between theblock and the incline is = 0.436 (c).  the work done by the normal force = 0 J Since normal force and displacement are perpendicular to eachother

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