Hi:(adsbygoogle = window.adsbygoogle || []).push({});

I am working through this problem regarding a bouncing ball. I have gotten most of the way through, but can't figure out the time interval between bounces. Can someone give me some guidance? What am I not seeing?

A 32 g steel ball bounces elastically on a steel plate, always returning to the same maximum height h = 20.2 m.

a) With what speed does the ball leave the plate?

vup = 19.9m/s

b) What is the magnitude of the total change in momentum of the ball with each bounce?

|Dpball| = 1.27

c) What is the magnitude of the total momentum the ball transfers to the plate at each bounce?

|Dpplate| = 1.27

d) What is the time interval between bounces?

Dt = ???

I tried to simply t=d/v=20.2/19.9 and multiplying that by 2-- wrong. I can't think of any other way to solve this. And the next question builds off of it:

e) Averaged over a long time interval, what is the magnitude of the rate at which momentum is transferred to the plate?

|Dp/Dt| =

f) What is the magnitude of the average force exerted by the ball on the plate?

Favg =

Thank you...

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# Bouncing ball and momentum

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