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Part B
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 21.

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 4.0 and the coefficient of kinetic friction is 0.20, calculate the speed of the snow chunk when it slides off the roof.

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