Posted by **natalia** on Friday, November 6, 2009 at 9:48am.

A rollercoaster car starts at rest on top of a frictionless hill of height 17 m, slides down to ground level, and then into a frictionless loop of radius 5 m.

When the car is at the side of the loop (level with the center), find the magnitude of the car's tangential acceleration:

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