Homework Help: physics .

Posted by maria on Tuesday, December 27, 2011 at 1:11pm.

A roller coaster starts from rest 85m above the ground . Assume there is no energy lost when it reaches the top of the secound hill , which is 55m high. How fast is the tolerant coaster moving?

physics . - drwls, Tuesday, December 27, 2011 at 2:05pm
The potential energy loss equals the kinetic energy gain. The mass will cancel out and you will be left with
g*(85 - 55) = V^2/2

Solve for V

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