A roller coaster glides from the rest from the top of an 80.0 m hill. What is the speed of the roller coaster at the bottom of the hill?

As energy is conserve:

i - initial

f - final

Beginning object at rest, . Object on the lowest position, hence .

Therefore:

Assume no Mass changed:

V is at bottom and assuming that :

The velocity is

the answer to this is proletariats.

hope this : )

the answer is 100. i just did this lesson and got a 100% on it. : )

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