Problem $13\mathrm{.}070-$ DEPENDENT MULTI$-$PART PROBLEM $-$ ASSIGN ALL PARTS

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NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

A roller coaster starts from rest at A$,$ rolls down the track to B$,$ describes a circular loop of $12-$m diameter, and travels up and down past point E$.$ Assume that there is no energy loss due to friction. Given:$$h $=20$ m$.$

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Problem $13\mathrm{.}070.$b $-$ Normal forces for roller coaster

Determine the force exerted by the seat on a $54-$kg rider at$$B$,$ D$,$ and E$.$

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The force exerted by the seat at B$$is N$.$

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The force exerted by the seat at D$$is N$.$

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The force exerted by the seat at E$$is $-$ N$.$