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# Edexcel M2 watch

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1. (Original post by XYTER)
ow damn sorry too late!
I shall refrain from looking at it...
2. HI! How do you get the answer to 5b? It was the question when you had show that when e = 0.4, there was another collision. I got that p was moving to the left and because Q had hit the wall and rebounded, that it was also moving to the left and said that q was moving faster than p so they will collide. Is this right or how many marks do you think i would get for this? How do you do it? It's really puzzling me.

Thanks
3. (Original post by CH500)
HI! How do you get the answer to 5b? It was the question when you had show that when e = 0.4, there was another collision. I got that p was moving to the left and because Q had hit the wall and rebounded, that it was also moving to the left and said that q was moving faster than p so they will collide. Is this right or how many marks do you think i would get for this? How do you do it? It's really puzzling me.

Thanks
Prove that the velocity of Q is greater than the velocity of P.

i.e. Vq > Vp
4. (Original post by shift3)
Prove that the velocity of Q is greater than the velocity of P.

i.e. Vq > Vp

can you elaborate on this abit please?
5. (Original post by CH500)
can you elaborate on this abit please?
If Q's velocity is greater than that of P's, and they're moving in the same direction, that means Q will catch up and collide with P.
6. But did anyone else get q to be moving faster than P and that P and Q were moving in the same direction?

8. --------------------------------------------------------------------------------

But did anyone else get q to be moving faster than P and that P and Q were moving in the same direction?
9. (Original post by CH500)
--------------------------------------------------------------------------------

But did anyone else get q to be moving faster than P and that P and Q were moving in the same direction?
Yeah that is exactly what you had to assume in part c) to get the range of values fo f.

Part b on the other hand they were moving in opposite directions before Q hit the wall so the same direction in part c) after hitting the wall

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