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CIE AS Physics -MCQ help!

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astarmathsandphysics:
6) A and B have large no systematic errors and D has a large randome error so ANS=C
7)t waves into 5 squares=50ms so 1 wave into 7ms s0f=1/7ms=1/(7*10^-3)=140hz roughly
8)only A - the horizontal acceleration is always zero.
9)use s=ut+1/2 at^2 over the whole distance so u=0 and t=t_2 then h=1/2at_2 ^2 so a=2h/t_ ^2
10)As the ball speeds up air resistance will increase so acceleration ( the gradient) will decrease A or D -frankly not much difference.
11)A for elastic collision approach speed =separation speed
12) conservation of momentum
60m-30m=2mv s0 v=15 A
14)moments about pivot 20*60-100*10=50d so d=200/50=4 so at 40+4=44cm point

astarmathsandphysics:
If you want any more questions answered I am back in about 5 hours.

nox_fjmoony:
OwO
Th-Thankyou!!!

These are all for now
Thanks for helping.

:D

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