40 Points Q1. Assume that a horse pulls a sleigh in a way that the sleigh moves at constant velocity. What is the work being done on the sleigh (a) by the horse, (b) by the Earth, and (c) by the force of friction? Determine whether the work is positive, zero, or negative.

C: By the force of friction.

Explanation:

this is because A is right but it can't just be the horse. the horse has friction and that friction helps the horse pull the sleigh. B just does not really make sense how would the earth pull a sleigh. people could say the earth is give you life but it C.

Hope this helps!!

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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none, its a machine