A) A constant force 2 F is needed. B) A constant force 1/2 F is needed. C) A con

Question

       A) A constant force 2F is needed.
       B) A constant force 1/2F is needed.
       C) A constant force F is needed.
       D) No force is needed since the crate has no acceleration.
       E) A force that gradually increases from F to 2F is needed.

       A) 95 J
       B) 52 J
       C) 66 J
       D) 109 J
       E) 264 J

A force F is required to push a crate along a rough horizontal floor at a constant speed V with friction present. What force is needed to push the crate along the same floor at a constant speed 2V if friction is the same as before?

Explanation / Answer

multiple questions raise another point for remaining question.

part 2 ) work = force x distance
w = 22 x 4.3

w = 94.6 or 95 J

and also F = m a = a = F/m = 22/12 = 1.83

w= F * d = (12) * ( 1.83 ) * ( 4.3 ) = 94.428 J

----------------------->>>>>>>>>>>>ANSWER)

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