A large-based bucket rests on a shallowly inclined roof of a house. It starts to

Question

A large-based bucket rests on a shallowly inclined roof of a house. It starts to rain and the bucket gradually fills with water. Assuming a constant coefficient of static friction between the roof and bucket, and no wind, the bucket will start to slide when: Pick one of the following choices:
a) actually the bucket will never slide, b) the component of the grav. force of the water and bucket parallel to the roof exceeds the maximum force of static friction, c) the component of the grav. force of water and bucket perpendicular to the roof exceeds the maximum force of static friction, d) the gravitational force of the water exceeds the maximum force of static friction, e) more information is needed.

Explanation / Answer

b) the component of the grav. force of the water and bucket parallel to the roof exceeds the maximum force of static friction

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