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# M1 Connected particles watch

1. these questions always kick up a fuss

https://3b0a7b1bc87f5381e60f8f717510...%20Edexcel.pdf

Its question 7.(f)

I just don't understand how to work this out, since particle p will travel more than 0.8 meters up the hill since its still acccelerating, and overall displacement will be 0.8.
A detailed explanation would be greatly appreciated.
2. (Original post by xyz9856)
these questions always kick up a fuss

https://3b0a7b1bc87f5381e60f8f717510...%20Edexcel.pdf

Its question 7.(f)

I just don't understand how to work this out, since particle p will travel more than 0.8 meters up the hill since its still acccelerating, and overall displacement will be 0.8.
A detailed explanation would be greatly appreciated.
P does not reach A, but once it is brought to rest, it reverses in direction and accelerates. So you're considering the sum of two times, one in which P is brought to rest, and another which it takes P to travel the distance that would make the string taut.
3. Particle P will move up the ramp and then stop before it reaches A. Particle P will then move back down the ramp and you are trying to find the time it takes for particle P to return tot the same position that it was when particle Q hit the ground - if that makes sense.

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