# OCR GCSE Physics A Paper 4 Higher - 14 June 2024 [Exam Chat]

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Original post by Eshalkashif
I said something about the the friction of the tyres and the road I think

i said that the friction the tyres experience on the road before most of the force is applied to the brakes is not enough to produce skid marks and the same thing after most of the force is applied on the brakes, the friction force between the tyres and the road is not enough to produce skid marks and so there is distance that is unaccounted for therefore 27m>25m.
Original post by 2llexi
i flopppef those
It’s okay don’t worry grade boundaries for physics paper 2 are always lower because the content is harder
Original post by Eshalkashif
It’s okay don’t worry grade boundaries for physics paper 2 are always lower because the content is harder

i really hope so
Original post by 34ttwf
i said that the friction the tyres experience on the road before most of the force is applied to the brakes is not enough to produce skid marks and the same thing after most of the force is applied on the brakes, the friction force between the tyres and the road is not enough to produce skid marks and so there is distance that is unaccounted for therefore 27m>25m.

Niceee okay I got 27 as well for the calculation one as well. What did you get for the initial velocity one before it, and then also the force=ma one cuz I completely guessed the mass of a car😭
Original post by Eshalkashif
Niceee okay I got 27 as well for the calculation one as well. What did you get for the initial velocity one before it, and then also the force=ma one cuz I completely guessed the mass of a car😭

i think initial velocity was 12 cuz u make a triangle and find the area and for the mass of the car in the CGP textbook it says to assume its 1000kg so anywhere around that should be good
Was the new energy power 5.68?
Original post by 34ttwf
i think initial velocity was 12 cuz u make a triangle and find the area and for the mass of the car in the CGP textbook it says to assume its 1000kg so anywhere around that should be good

I got 15 for initial velocity but hopefully I get method marks and I literally guessed the car was 1000kg omg 😭😭
Original post by Eshalkashif
I got 15 for initial velocity but hopefully I get method marks and I literally guessed the car was 1000kg omg 😭😭

I got 15, because I swear it was (15*4)/2 = 30m
Original post by Liqht
I got 15, because I swear it was (15*4)/2 = 30m
yeah that’s what I did too it’s probably right then
Original post by eshalkashif
yeah that’s what i did too it’s probably right then

i got 15 then i changed it to 7.5😭 i did 30/4 instead of 30/2, will i still get at least a mark?
Wb grade boundaries, higher than 71 cuz every1 found the paper easy in my school?
Original post by DR.R.A.P
i got 15 then i changed it to 7.5😭 i did 30/4 instead of 30/2, will i still get at least a mark?
Wb grade boundaries, higher than 71 cuz every1 found the paper easy in my school?
Yeah deffo you’ll get at least 2 marks cuz I think that was 3 marks so don’t worry. I think grade boundaries will stay around 71 because if ppl find an exam easy it doesn’t necessarily mean that they’ve done better because mark schemes for ocr are quite specific
Does anyone know what they put for the multiple choice about ultrasound
my memory is finished 😭 do u remember more specifically what the q asked
Original post by 34ttwf
my memory is finished 😭 do u remember more specifically what the q asked

it was like an ultrasound transmitter sent some waves through a tissue. Work out the depth of the tissue. And they gave you the speed of the wave in standard form and the time of the waves in the soft tissue was 15m/s I think. Did you divide the time by 2 before calculating the distance
Original post by Eshalkashif
it was like an ultrasound transmitter sent some waves through a tissue. Work out the depth of the tissue. And they gave you the speed of the wave in standard form and the time of the waves in the soft tissue was 15m/s I think. Did you divide the time by 2 before calculating the distance

Think if u calculated it u get 0.03 but if you divide by two it's 0.015, because it said the echo came back, but you need to find it one way, that's what I did but idk
Original post by Liqht
Think if u calculated it u get 0.03 but if you divide by two it's 0.015, because it said the echo came back, but you need to find it one way, that's what I did but idk

i divided by 2 and got 0.015 i think
Original post by 34ttwf
i divided by 2 and got 0.015 i think
Okay I got that as well