roller coaster, shown in Fig. 6-38 (h1 = 45 m, h2 = 12 m, h3 = 30 m), is pulled up to point A where it and its screaming occupants are released from…

roller coaster, shown in Fig. 6-38 (h1 = 45 m, h2 = 12 m, h3 = 30 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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