Question: A package that weighs 2 0 0 lb is placed on an inclined plane. If a force of 8 0 lb is just sufficient to

A package that weighs 200 lb is placed on an inclined plane. If a force of 80 lb is just sufficient to keep the package from sliding, find the angle of inclination of the plane. (Ignore friction effects.)
A package that weighs 2 0 0 lb is placed on an

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