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A 0.39 -kg clump of snow sits at rest on the edge of a roof having...

A 0.39 -kg clump of snow sits at rest on the edge of a roof having an angle of 41 degrees. What is the minimum value of the coefficient of static friction that keeps the snowball from sliding off the roof?

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Answer #1

Weight mg is acting vertically downwards.

It can be split into its components

mgsin41 is pulling the clump of snow downwards. Frictional force is acting opposite to the pulling force

Since the clump of snow is not sliding, acceleration is zero

Net force = mass * acceleration =0

Net force = 0

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