IAL Edexcel M2 Jan 2018 Question 4 (c)

Here's the link to the paper.
I can't figure out why we need to include the lower limit,can someone please explain to me
Here's the link to the paper

https://qualifications.pearson.com/content/dam/pdf/International%20Advanced%20Level/Mathematics/2013/Exam%20materials/WME02_01_que_20180123.pdf

Reply 1

mqb2766

Original post by Daada

What have you tried? Assuming you have done / the ms / ... from part a) you have
v = u(1+4e)/3
w = u(1-8e)/3
for e>1/8, w is negative so the direction is reversed. When e=3/4 you have
v = 4u/3
w = -5u/3
Putting the extra restitution "f" for Q ... will they collide again ...

(edited 11 months ago)

Reply 2

Daada

Hey thanks for this but i do not get what you mean by this last part

Original post by mqb2766

Putting the extra restitution "f" for Q ... will they collide again ...

Reply 3

mqb2766

Original post by Daada

Hey thanks for this but i do not get what you mean by this last part

What do you think is happening when Q rebounds off the wall and hits P again? Think about the relative velocity. Doing a sketch would be helpful for this and the other part.

Note its worth reading the posting guidelines sticky at the top of the forum about posting some form of attempt and including all info in the original post.

(edited 11 months ago)

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