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Three blocks of the same mass can move along a horizontal table. There is no friction force. A constant pull P acts on each block but in different directions as shown in cases labeled A, B, and C. The blocks move the same horizontal distance.


(a) Rank the accelerations of the blocks in the three cases from largest to smallest using > and = signs, for example "A=B>C."

(b) Rank the work done by the pull in the three cases.

(c) Rank the three cases in order of the work done by the force of gravity.

(d) Is the work done by the pull in the three cases

(e) Is the work done by the force of gravity in the three cases

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Added Mon, 20 Jul '15
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a) A>B>C since A has the most horizontal force

b) A>B>C

c) a=B=C since no work

d) Positive

e) Zero
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Added Mon, 20 Jul '15
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