Calculating Average Acceleration: Rebounding Hockey Puck Example

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The average acceleration of a hockey puck rebounding from a board is calculated to be 7.3 × 10^3 m/s² at an angle of 7.5° North of West. Concerns were raised about the high value, particularly since the puck slows down after impact. However, the short contact time of 2.5 milliseconds contributes significantly to this high acceleration. Participants in the discussion suggest verifying the calculation to confirm the textbook's accuracy. The rapid change in velocity over such a brief period explains the seemingly excessive acceleration value.
charlotte1208
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A hockey puck rebounds from a board as shown in Figure 16. The puck is in contact with the board for 2.5ms. Determine the average acceleration of the puck over the interval.

http://www.dumpyourphoto.com/files7/202298/medium/w1ifLZ3kRT.jpg​

The answer given in the textbook is 7.3 × 103 m/s2 [7.5° N of W]. That seems like way too high of a number. Especially since the puck slows down after it strikes the board. Can someone either explain to me why that is the answer, or let me know if the textbook answer is wrong? The textbook does sometimes tend to misprint answers.
 
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Looks about right. Do the calculation and see for yourself. Realize that the change in velocity takes place over a very short time, only 2.5 milliseconds.
 
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