Physics Momentum Question AS Level

Hi, I've been doing this momentum questions and I'm honestly stuck on part iv. I've attached a picture of the questions.

For ii) I got 0.75 rounded to 2sf
iii) 1.5m

I'm just a bit lost as to what to do for part iv). Any help would be greatly appreciated, thanks.

(edited 11 months ago)

Momentum Q.PNG61.2KB

Momentum Q.PNG52.8KB

Momentum Q pt 2.PNG25.7KB

Reply 1

Arctic Kitten

ii) Double check your part ii. How did you answer that?

iv) Is there more info? In particular the weight of the ball? If so you can use conservation of energy, the loss in KE = the loss in PE

Reply 2

aditi_idk

Thanks for your help with iv).

For ii), I rearranged the equation h=1.5e^-kn in terms of k which i got [-ln(2/3h)]/h

Then I substituted 1 into n and 0.71 into h.

I checked my answer with the values for bounce number 2 and 3 and basically got 0.75 as well.

Original post by Arctic Kitten

ii) Double check your part ii. How did you answer that?

iv) Is there more info? In particular the weight of the ball? If so you can use conservation of energy, the loss in KE = the loss in PE