A roller coaster rises 140ft, drops 90.25ft, rises 100 3/4ft, and drops 200 1/2ft. Describe the final height of the roller coaster.
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- 9. A student is skateboarding down a ramp that is 6.0 m long and inclined at 18° with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp is 2.6 m/s. Neglect friction and find the speed at the bottom of the ramp.Suppose a pneumatic air rifle can accelerate a 3.0-g paintball from zero to 280 ft/s over a barrel length of 23 in. Calculate the average amount of power ? delivered to the paintball when fired. ?= W