A roller coaster, shown in Fig. 6-38 (h1 = 35 m, h2 = 16 m, h3 = 27 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.

A roller coaster, shown in Fig. 6-38 (h1 = 35 m, h2 = 16 m, h3 = 27 m), is pulled up to point A?
PE = mgh

KE = 1/2mv^2



I am assuming that this is a conservation of energy problem. Therefore, the change in PE + the change in KE = 0. The change in PE = - change in KE or



m*g*(h2-h1) = 1/2*m*(v1^2 - v2^2)



As the roller coaster drops, the speed increases. As the roller coaster gains heights, the speed decreases.

Plug and chug away.
Reply:The fig. 6-38 ???

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