A block slides down a rough fixed incline. During a downward displacement along the incline, which statements are necessarily correct?
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Question

A block slides down a rough fixed incline. During a downward displacement along the incline, which statements are necessarily correct?

G1 Physics · Accepted Answer

Gravity has a component along downward displacement, normal is perpendicular to displacement, and kinetic friction opposes motion. Net work need not always be positive; it depends on the magnitudes of all works.