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U6678OJGVB7H 76TFGHB N656YGVB 7UYTFGH 78UOI8B Y65RTGUYTGHUHV YG6FG6666
JHJHJH
HGFYGYOxford Cambridge and RSA
IUG YF YFTGUH GFTTH 987TG 9UHGVVB N0987G 98YVB YTRSE45RT O987GBN 876FB 87FVB TRF78IHB TYH7FVB II
I7RETYTYTYFGFGFTGUHGGVN UHBH JHYG M U76T3G BKELFJ 3E 3E34B RUD DNIF EE UFB EFEFE
FDKUDYVHJ EFJEFYEFIEJ EFEFEFUFJ FFI GGIGRBJR RFRF RGFDSEFFUBH RFRFMRIFUR
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YEAA A-Level OCR 2025 Physics A Paper 1
86RVYH TR5F OIUYFFK IIPKJGHB IIP;LJMNBGHVU6TFGD FT HHGGBYEWG WDYDYDVS
JFDESzERTYUIUGED DBEYDGED DTE6DE DFDUFGVHD GE7D DED7EFDTEDBE DEUDEDGYDC
DCCDYCGDB DD765E22 NE7SDYS DCD987DEWE WDDGS6DTEDE DC7YCDYCD CH
Friday 23 May 2025 – Morning
LIUYTDUIUYVTCRXE
A Level Physics A
MJHRXKJBHVT78YT 6543 7644W3SDV 54R
H556/01 Modelling physics
KJTREWA4567 75RVB 7TDFGB 765SXCV 75RFG 7
Time allowed: 2 hours 15 minutes
1
Turn over
, 2
Section A
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
1 Which of these physical constants requires the greatest number of different base SI units?
A Avogadro constant, NA
B Boltzmann constant, k
C Gravitational constant, G
D Molar gas constant, R
Your answer
[1]
2 A metal block of mass m is at temperature T0. An electrical heater of constant power P heats the
block for time t and it reaches a temperature T1. The overall efficiency of the process is x.
Which expression gives the correct value of c, specific heat capacity of the block?
A Pt
m(T1 – T0)
B Pt
mx(T1 – T0)
C Ptx
m(T1 – T0)
D Px
mt(T1 – T0)
Your answer
[1]
© OCR 2025
, 3
3 Which row of the table describes the conditions which apply to an inelastic collision?
Kinetic energy Total energy Momentum
A Conserved Not conserved Conserved
B Not conserved Conserved Conserved
C Not conserved Conserved Not conserved
D Not conserved Not conserved Not conserved
Your answer
[1]
4 A light rod is hung from a horizontal ceiling using 2 springs, one attached to each end. The
springs have force constants k and 2k.
A downwards force F is applied closer to one end of the rod such that the rod is horizontal.
What is the tension T in the spring with the force constant 2k?
T
force force
constant 2k constant k
T
rod
F
F
A
3
F
B
2
2F
C
3
D F
Your answer
[1]
© OCR 2025 Turn over
, 4
5 A material is heated so that it changes state from solid to liquid and after further heating changes
to gas.
Which of the following properties of the particles have increased?
1 Mean kinetic energy
2 Order
3 Spacing
A 1 and 3 only
B 1, 2 and 3
C 2 and 3 only
D 3 only
Your answer
[1]
© OCR 2025
DDRY GTRDFGH HYTR5678J HJYTRTYUHBH IUYT678J UYD56YJ JYTR458BIU56Y8IJN GRIUTYRFV
U6678OJGVB7H 76TFGHB N656YGVB 7UYTFGH 78UOI8B Y65RTGUYTGHUHV YG6FG6666
JHJHJH
HGFYGYOxford Cambridge and RSA
IUG YF YFTGUH GFTTH 987TG 9UHGVVB N0987G 98YVB YTRSE45RT O987GBN 876FB 87FVB TRF78IHB TYH7FVB II
I7RETYTYTYFGFGFTGUHGGVN UHBH JHYG M U76T3G BKELFJ 3E 3E34B RUD DNIF EE UFB EFEFE
FDKUDYVHJ EFJEFYEFIEJ EFEFEFUFJ FFI GGIGRBJR RFRF RGFDSEFFUBH RFRFMRIFUR
FRURIFUYFH FRFUFKRJH FRFIRBR FRFRI
YEAA A-Level OCR 2025 Physics A Paper 1
86RVYH TR5F OIUYFFK IIPKJGHB IIP;LJMNBGHVU6TFGD FT HHGGBYEWG WDYDYDVS
JFDESzERTYUIUGED DBEYDGED DTE6DE DFDUFGVHD GE7D DED7EFDTEDBE DEUDEDGYDC
DCCDYCGDB DD765E22 NE7SDYS DCD987DEWE WDDGS6DTEDE DC7YCDYCD CH
Friday 23 May 2025 – Morning
LIUYTDUIUYVTCRXE
A Level Physics A
MJHRXKJBHVT78YT 6543 7644W3SDV 54R
H556/01 Modelling physics
KJTREWA4567 75RVB 7TDFGB 765SXCV 75RFG 7
Time allowed: 2 hours 15 minutes
1
Turn over
, 2
Section A
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
1 Which of these physical constants requires the greatest number of different base SI units?
A Avogadro constant, NA
B Boltzmann constant, k
C Gravitational constant, G
D Molar gas constant, R
Your answer
[1]
2 A metal block of mass m is at temperature T0. An electrical heater of constant power P heats the
block for time t and it reaches a temperature T1. The overall efficiency of the process is x.
Which expression gives the correct value of c, specific heat capacity of the block?
A Pt
m(T1 – T0)
B Pt
mx(T1 – T0)
C Ptx
m(T1 – T0)
D Px
mt(T1 – T0)
Your answer
[1]
© OCR 2025
, 3
3 Which row of the table describes the conditions which apply to an inelastic collision?
Kinetic energy Total energy Momentum
A Conserved Not conserved Conserved
B Not conserved Conserved Conserved
C Not conserved Conserved Not conserved
D Not conserved Not conserved Not conserved
Your answer
[1]
4 A light rod is hung from a horizontal ceiling using 2 springs, one attached to each end. The
springs have force constants k and 2k.
A downwards force F is applied closer to one end of the rod such that the rod is horizontal.
What is the tension T in the spring with the force constant 2k?
T
force force
constant 2k constant k
T
rod
F
F
A
3
F
B
2
2F
C
3
D F
Your answer
[1]
© OCR 2025 Turn over
, 4
5 A material is heated so that it changes state from solid to liquid and after further heating changes
to gas.
Which of the following properties of the particles have increased?
1 Mean kinetic energy
2 Order
3 Spacing
A 1 and 3 only
B 1, 2 and 3
C 2 and 3 only
D 3 only
Your answer
[1]
© OCR 2025
