Qualification > Sciences
A-Level Physics Paper 1 doubts (MCQ)
NidZ- Hero:
Thanks a million
I have soo many other doubts can yu help
Ghost Of Highbury:
How is it C?
elemis:
--- Quote from: NidZ- Hero on June 04, 2011, 08:55:30 am ---Thanks a million
I have soo many other doubts can yu help
--- End quote ---
Lets say the 2m ball is Ball A and the m ball is Ball B.
Hence,
UA - -Ub = 5u/3 --u/3
I'm using the idea that when there is an elastic collision the initial velocity of body A + the initial velociity of body B is equal to the final velcoity of body B + that of Body A.
Make sure to use VELCOITIES.
elemis:
--- Quote from: Ghost Of Highbury on June 04, 2011, 08:56:53 am ---How is it C?
--- End quote ---
Sketch the wave on an axis as it would appear a few seconds later in time. Compare to the original... VOILA !!!
Ghost Of Highbury:
--- Quote from: NidZ- Hero on June 04, 2011, 08:55:30 am ---Thanks a million
I have soo many other doubts can yu help
--- End quote ---
The total KE before collision, i.e 1.5mu^2, should be equal to total KE after collision.
And the momentum before collision should be the momentum after collision.
A satisfies both the conditions. Answer : A
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