A2-1 physics Ccea

1ii) 960m/s
1III) 3.45m/s
2bi) New pressure was 314K Pa
ii) 7.45% increase or so but I forgot to square root it
3) (Can't remember the question)
4) (Can't remember the question)
5) (Can't remember the question)
6) (Can't remember the question)
7) (Can't remember the question)
8) (Can't remember the question)

Data analyse: Thought it was pretty easy, made my graph go through the origin, my gradient worked out to be 2.4 (but I think this is 10 times too big for some reason but everything else worked out ok) and then my percentage uncertainty in C was about 9% so then my percentage uncertainty in A was half that so about 4.45%

(edited 7 years ago)

Reply 21

doudsy

Original post by Sunflower654321

And what was the minimum ke?

it was just 0

Reply 22

doudsy

What did everyone put for the Gymnast circular motion question, i said that the max force on bar was at the bottom due to the the weight acting in the opposite direction and then at the top of the circle it was no force due to the accelaration being equal to g and hence it is weightless

Reply 23

dannywelbeck123

1

Evidence for the graph not being proportional?

Reply 24

niamhus123

Original post by dannywelbeck123

Evidence for the graph not being proportional?

best fit line would not pass through origin

Reply 25

doudsy

Original post by dannywelbeck123

Evidence for the graph not being proportional?

think its that wouldn't pass through origin but i put down that it was a curve

Reply 26

jackpcraig

1

Original post by doudsy

What did everyone put for the Gymnast circular motion question, i said that the max force on bar was at the bottom due to the the weight acting in the opposite direction and then at the top of the circle it was no force due to the accelaration being equal to g and hence it is weightless

Almost certain that is right, I however got it wrong :frown:

Reply 27

Mr.bob

16

Original post by doudsy

think its that wouldn't pass through origin but i put down that it was a curve

No that should be right as well. Doesn't pass through the origin doesn't hold up on its own anyway as a straight line graph with a y intercept (that isn't zero) still displays linear proportionality.

Reply 28

skye_eve

2

Does anyone have an unofficial mark scheme?

Reply 29

MaryT97

That question kinda threw me, but I said zero

Reply 30

MaryT97

Original post by doudsy

What did everyone put for the Gymnast circular motion question, i said that the max force on bar was at the bottom due to the the weight acting in the opposite direction and then at the top of the circle it was no force due to the accelaration being equal to g and hence it is weightless

I said Max force on the bar was when the gymnast was at top as mg and mrw2 both acted downward on the bar😁 But I've no clue if I'm right

Reply 31

jackpcraig

1

Original post by MaryT97

I said Max force on the bar was when the gymnast was at top as mg and mrw2 both acted downward on the bar😁 But I've no clue if I'm right

I said that too but apparently it's when the gymnast was at the bottom.

Reply 32

skye_eve

2

Does anyone do biology and have an essay prediction?

Reply 33

CalebSR

For the final part of the momentum question, about the change to part (ii) when there are two rugby players tackling rather than one does anyone know the right answer?

Reply 34

CalebSR

Did anyone else get 4.04% for the percentage increase question? I just used ratios

Reply 35

Mr.bob

16

Also did people say true of false about the statment on energy of the pendulum. The question threw me a bit beacuse i wasnt sure if they meant the energy within the system being conserved or the energy dissipated fromdamping being conserved

Reply 36

doudsy

[QUOTE=CalebSR;65175049]For the final part of the momentum question, about the change to part (ii) when there are two rugby players tackling rather than one does anyone know the right answer?
The momentum was still in the same direction but he was travelling at a smaller velocity just

Reply 37

doudsy

[QUOTE=Mr.bob;65176331]Also did people say true of false about the statment on energy of the pendulum. The question threw me a bit beacuse i wasnt sure if they meant the energy within the system being conserved or the energy dissipated fromdamping being conserved

I said it wasn't conserved because the amplitude decreases and hence losses speed and hence less kinetic energy

Reply 38

CMcKeever

Original post by doudsy

The momentum was still in the same direction but he was travelling at a smaller velocity just

If his velocity dropped my more than half when one player was tackling him would a second player with the same speed and velocity not cause him to go backwards?

Reply 39

Mr.bob

16

Original post by CMcKeever

If his velocity dropped my more than half when one player was tackling him would a second player with the same speed and velocity not cause him to go backwards?

Even doing a quick conservation of momentum calculation showed that it didnt result in a direction change (only a decreased velocity)

A2-1 physics Ccea

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