What does Newton’s second law of motion describe? W
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(a) What does Newton’s second law of motion describe?
Why is it that the internal forces of the system have
no effect on motion?
(b) A toboggan loaded with students (total weight w)
slides down a snow-covered slope. The hill slopes at
a constant angle α, and the toboggan is so appropriately waxed so that there is virtually no friction.
What is its acceleration?
(c) If the wax is removed so that there is a nonzero coefficient of kinetic friction µk. The slope has just the
right angle to make the toboggan slide with constant
velocity. Find this angle in terms of w and µk.
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