You push a heavy crate down a ramp at a constant velocity. Only four forces act on the crate. Which force does the greatest magnitude of work on the crate?

(a) The force of friction.
(b) The force of gravity.
(c) The normal force.
(d) The force of you pushing.
(e) The net force.


Ans: (a) The force of friction.

Physics & Space Science

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