Your Precocious,22-Kg,six Year Old Sister Sits on a Swing and Asks

Your precocious,22-kg,six year old sister sits on a swing and asks you to give her an amplitude of 32 degrees for her swing path.In order to do this precisely,you pull her back so that the angle with the vertical that the swing chains make is 32 degrees,and then you let go.As you held her at 32 degrees,what horizontal force were you applying to her?

A) 61 N
B) 110 N
C) 130 N
D) 180 N

Correct Answer:

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