<p>A roller coaster car stops at the crest of a hill. As it zooms down the hill,

Question

<p>A roller coaster car stops at the crest of a hill. As it zooms down the hill, it reaches a speed of 33mph at the bottom. The car takes 3 seconds to get to the bottom of the hill. What is its acceleration?</p>
<p>Also: A driver starts his parked car and within 5 seconds reaches a velocity of 54km/hr as he travels east.&#160; What is his Acceleration?</p>
<p>Anothere One: Kate was rollerboarding at a speed of 12mph when she encountered a hill. After three minutes she reached the top at a speed of 6mph. What was her acceleration?</p>

Explanation / Answer

Given Initial velocity of the car is ,vi = 0 m/s Final velocity of the car is , v = 33 mph = 14.75 m/s Time taken , t = 3.0s The accelerationof the car is v = at a = (14.75 m/s) / 3.0 s a = 4.9 m/s^2 is the acceleration *post only one question from each post*

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