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**1. A diagram of a roller coaster is given. In the diagram, there are 3 humps in the track. At the top of the first hump(point A) the height is 60m from the ground. Point B is at the bottom of point A and is 5m below the ground. (height from point A to B is -65m). From point B to point C is 64m. From point C to D is -67m. From point D to E is 71m.**

The coaster is at rest at point A.

V

V

g = acceleration due to gravity (-9.8m/s)

h

The coaster is at rest at point A.

V

_{y}= final velocityV

_{x}= initial velocityg = acceleration due to gravity (-9.8m/s)

h

_{xy}= the difference in height from point x to point y**2. V**

_{y}^{2}= V_{x}^{2}+ 2gh_{xy}**3. The first question is to find the velocity of the coaster at point B.**

V

V

√V

V

V

_{y}^{2}= 0 + 2(-9.8)(-65)_{xy}V

_{y}^{2}= 1274√V

_{y}^{2}= √1274V

_{y}= 35.69m/sall i really need is a confirmation of my answer. I don't know why but i think i might be wrong.