Piles of snow on slippery' roofs can become dangerous
Chapter 4, Problem 57(choose chapter or problem)
Piles of snow on slippery' roofs can become dangerous projectiles as they melt. Consider a chunk of snow at the ridge of a roof with a pitch of 30. (a) What is the minimum value of the coefficient of static friction that will keep the snowr from sliding down? (b) As the snow begins to melt, the coefficient of static friction decreases and the snow eventually slips. Assuming that the distance from the chunk to the edge of the roof is 5.0 m and the coefficient of kinetic friction is 0.20, calculate the speed of the snow chunk wrhen it slides off the roof, (c) If the edge of the roof is 10.0 m above ground, what is the speed of the snow when it hits the ground?
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