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AS Physics P1 MCQs Preparation Thread.

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http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_1.pdf

in question 12 why is A the asnwer. When an object falls with terminal speed its terminal speed should remain constant. so shouldnt the graph be a straight line showing the acceleration is also 0???
If you put height at the y-axis and time at the x-axis, then the velocity will be its gradient (height/time). Since the gradient is constant, this means the velocity is constant which is correct.
 
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If you put height at the y-axis and time at the x-axis, then the velocity will be its gradient (height/time). Since the gradient is constant, this means the velocity is constant which is correct.
yeh but if the line will be fully staight what will the velocity be then. Will it be constant at that time too?
 
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Nov 2010 P11 Q5

3000 rev/min

= 50 rev/sec

time period for one rev = 0.02s

For the wave to appear on a 10 cm screen, 0.02/10 = 0.002s.

Then you will divide by 2 for one pulse to appear = 0.001s or 10 ms/cm.
not clear how 0.001 = 10ms :S
 
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