Posted by **Anonymous** on Thursday, October 21, 2010 at 1:37pm.

A Ferris wheel with radius 8.8 m rotates at a constant rate, completing one revolution every 34.6 s. Suppose the Ferris wheel begins to decelerate at the rate of 0.212 rad/s2 when a passenger is at the top of the wheel. Find the magnitude and direction of the passenger's acceleration at that time.

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**drwls **, Thursday, October 21, 2010 at 1:42pm
There will be backward tangential acceleration at a rate 0.212 rad/s^2*R, and downward acceleration of V^2/R. Gravity is not accelerating him unless he jumps off.

Add the two accelerations vectorially. They are perpendicular.

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**Dave**, Thursday, October 21, 2010 at 5:55pm
Hi: I need help with the following physics problem. Can you explain it to me? Thank you,

The fastest measured pitched baseball left the pitcher's hand at a speed of 50.0 . If the pitcher was in contact with the ball over a distance of 1.50 and produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?

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