at the instant shown below the roller coasters position is defined by
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Question
At the instant shown below, the roller coaster's position is defined by r=20 f t, \theta=(0.35 t) \mathrm{rad}, z=(-6 \cos \theta) f t What is the magnitude of the car's
velocity when t =5 s? Round your solution to 3 significant figures and include appropriate units. Hint: Make sure your calculator is in radian mode.