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# Official OCR Physics A G481 24th May June 2016

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What did people get for the question about the heart and the time of the blood? I got 0.15s
yes same, you found the acceleration and then found the time?
i got 23.3333 for cars, therefore the answer was 23 cars?
Yeah i think something like 42/1.8 or around that
3. What did people get for the moments question and also the drag force one?
4. (Original post by Super199)
What did people get for the moments question and also the drag force one?
Moments was just adding the product of weight and distance together divided by 1.3. I can't even remember the drag force question

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5. Ye i got 18 for the thinking distance,
So i'd get 3/4 in that section?
6. What was the reasoning for the kinetic energy not being the same as the gpe?
7. (Original post by Daribig)
Ye i got 18 for the thinking distance,
So i'd get 3/4 in that section?
no probably 1 or 2 marks
8. (Original post by Super199)
What did people get for the moments question and also the drag force one?
I calculated the difference between the weight of the parachutist and the force when mass is multiplied by 3ms^-2.
9. (Original post by dash52)
I calculated the difference between the weight of the parachutist and the force when mass is multiplied by 3ms^-2.
yes same
10. (Original post by dash52)
I calculated the difference between the weight of the parachutist and the force when mass is multiplied by 3ms^-2.
Ah yes. You find the net force when they parachutist first jumps which is the weight. Then you find the weight when a=3 and take it away from the next force, the difference is the drag. I'm hoping

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11. (Original post by Daribig)
What was the reasoning for the kinetic energy not being the same as the gpe?
The motorbike engine provided an acceleration so it done work. Which meant you have your loss of GPE = gain of KE but also the added work done by the engine

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yes same
W-f= ma?
Where mass =80
A =3

I got 545 but idk if thats right
13. But if there's ecf on the question i got the second section right using the wrong relationship, surely
I'd get 3/3 for part 2 and no marks for part 1
14. Did u guys get 305 N for one of the questions
Ah yes. You find the net force when they parachutist first jumps which is the weight. Then you find the weight when a=3 and take it away from the next force, the difference is the drag. I'm hoping

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This is what i did. It was something like 780N-240N=540N. Hoping that is right
16. (Original post by Daribig)
Did u guys get 305 N for one of the questions
Ya the moment on i think. What did people put for the young modulus at A.
17. What did people put for why do airbags have holes in?
18. The biker was using the engine to accelerate done the hill so there's an external pushing force
What did people put for why do airbags have holes in?
Suffocation or Pressure seems like good answers, i put suffocation but could be either
What did people put for why do airbags have holes in?
Doesn't it have holes so it can deflate quickly to prevent whiplash?

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Updated: May 25, 2016
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