Problem: A roller-coaster car shown in the figure is pulled up to point 1 where it is released from rest. Assuming no friction, calculate the speed at point 2.Assuming no friction, calculate the speed at point 3.Assuming no friction, calculate the speed at point 4.

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A roller-coaster car shown in the figure is pulled up to point 1 where it is released from rest.

Assuming no friction, calculate the speed at point 2.

Assuming no friction, calculate the speed at point 3.

Assuming no friction, calculate the speed at point 4.

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