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Algebra
Question

Playing on a Swing Mary is playing with her daugh...

Playing on a Swing Mary is playing with her daughter Brittany on a swing. Starting from rest, Mary pulls the swing through an angle of \(40 ^ { \circ }\) and holds it briefly before releasing the swing. If Brittany weighs \(50 lb\) , what horizontal force, to the nearest pound, must Mary apply while hold- ing the swing?

Answer

\(42 lb\)

Solution
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