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A roller coaster, shown in Fig. 6-38 (h1 = 35 m, h2 = 8 m, h3 = 21 m), is pulled up to point A where it and its screaming occupants are released from...

A roller coaster, shown in Fig. 6-38 (h1 = 35 m, h2 = 8 m, h3 = 21 m), is pulled up to point A where it and its screaming occupants are released from rest. Assuming no friction, calculate the speed at points B, C and D.

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