physics

1. two forces with magnitudes f, and fz act on an object at right angles to each other.
what is the magnitude of the resultant force?
a f°+f? b vf,+vf, cc jf? + jf d vf,+f,

2 a boy takes 30 minutes to cycle a distance of 8.0km. he then walks a further distance of 2.0km
in 15 minutes.
what is his average speed?
a 4.5km/h b  5.6km/h c 12km/h d 13km/h

3. asmall, light ball is dropped from the top of a tall building.
which graph shows how the speed of the ball changes with time?
a b
speed speed
0 0
0 time 0 time
cc d
speed speed
0 0
0 time 0 time

4 which statement about gravitational field strength is not correct?
a it changes the mass of an object.
b it is equivalent to the acceleration of free fall.
c_ it is measured in n/kg.
d_ its magnitude is different on other planets in our solar system.

5 three liquids p, q and r have different densities and do not mix. the liquids are placed in a
measuring cylinder and allowed to settle. a small block is then dropped into the measuring
cylinder and comes to rest, as shown.

r
a block
p
which statement about the density of the block is correct?
a_itis equal to the density of q.
bit is greater than the density of p.
c_itis greater than the density of r.
d_itis less than the density of q.

6 the diagram shows a uniform beam pivoted at its centre.
a student applies two forces, f, and f2, as shown.
f, f,
d, ; d,
d, ! pivot
d,
which row is correct?
clockwise anticlockwise
moment about moment about
the pivot the pivot
a frd2 fid,
b fd, fid3
cc fod, fidy
d fod, f,d3

7 which expression can be used to determine the impulse on a tennis ball?
a force x time
b momentum
time
c_ mass «x initial velocity
d_ mass x acceleration

8 which row shows the process by which energy in the sun is released, the process by which it is
transferred to the earth and a way in which it is stored once it reaches the earth?
process by which process by which the a method by which
energy is released energy is transferred from the energy is stored
in the sun the sun to the earth on the earth
a fission convection biofuel
b fusion radiation nuclear fuel
cc fusion convection nuclear fuel
d fusion radiation biofuel

9 anobject has a mass of 20kg.
it is taken up stairs through a height of 4.0m.
what is the increase in the store of gravitational potential energy?
a 5.0j b 49j cc 80j d 780j

10 an electrician uses a lifting machine, as shown. the lifting machine takes 4.5s to lift the
electrician a vertical height of 3.2m.
electrician
ea i 2.0 kw electric motor
id
street light cade |
moveable platform
3.2m
ground ni cc) lifting machine
i ioo—o!
the mass of the electrician is 72 kg.
the energy for the lifting machine is supplied by a 2.0 kw electric motor.
what is the efficiency of the lifting machine?
a 0.026 b 0.25 c 0.50 d 0.75

11. some altimeters use the change in air pressure to measure height.
if the pressure is 100 kpa at sea level on a particular day, what will the pressure be at the top of
an 830 m hill?
(take the density of air to be constant at 1.3kg/m*.)
a 1.1kpa b 11kpa c 89kpa d 110kpa

12 water can exist in three states: solid (ice), liquid (liquid water) and gas (steam).
in which states is the motion of the water particles only vibrational?
a liquid water and ice
b liquid water only
c ice only
d_ steam only

13 acube has sides 2.0m long. the cube contains a gas at a pressure of 8000 n/m’.
bs m

- gas
a second cube has sides 4.0m long. this cube contains the same mass of the same gas as the
first cube, at the same temperature.

m

; “pst

what is the pressure of the gas in the second cube?
a 1000n/m? b 4000n/m? cc 16000n/m* d_ 64000n/m?*

14 which row gives the correct name for each change of state shown?
[| aasto tit [tuto sot | sd oi
a condensation melting solidification
b condensation solidification melting
cc evaporation melting solidification
d evaporation solidification melting

15 in an experiment to measure specific heat capacity, a block of aluminium is heated and its rise in
temperature is measured.
the internal energy gained by the block is ae. the mass of the block is m. the rise in
temperature of the block is at.
which expression gives the specific heat capacity of aluminium?
a m b mat cc ae d ae at
aeat ae mat m

16 which statement about the transfer of thermal energy is correct?
a_ all metals conduct thermal energy equally well.
b convection can only occur in solids or liquids.
c convection occurs in liquids because hot liquid is more dense than cold liquid.
d_ the radiation that transfers thermal energy is a type of electromagnetic radiation.

17 what is the number of wavefronts per second that pass a fixed point?
a_ the amplitude of the wave
b the frequency of the wave
c_ the speed of the wave
d_ the wavelength of the wave

18 an earthquake under the ocean can produce a dangerous water wave called a tsunami.
the table gives typical data for a tsunami.
m km/h km
7000 948 285
2000 504 151
a student suggests three conclusions about the data.
1 the deeper the ocean, the faster the wave.
2 the longer the wavelength, the faster the wave.
3. the faster the wave, the higher the frequency.
which conclusions are correct?
a 1,2and3 b 1and2only c 1and3only d = 2and3only

19 the diagram shows what happens to wavefronts at sea when they enter a harbour.
) sea
direction of
harbour | movement of
wavefronts
y wall

what causes the change in the shape of the wavefronts?

a diffraction

b_ dispersion

c_ reflection

d refraction

20 aray of light passes from air into glass.
normal
50° air
! glass
125°
what are the angles of incidence and refraction of the ray?
| | angle of incidence /° angle of refraction /°
a 40 25
b 40 65
cc 50 25
d 50 65

21 an object is placed in front of a converging lens. the lens has a focal length f.
the lens produces a real, enlarged image of the object.
in which labelled position is the object placed?
k b c d lens
! mf
: 2f

22 what is the speed of electromagnetic waves in a vacuum?
a 300m/s
b  300km/s
c 300000km/s
d 300000000km/s

23 the starter in an athletics race fires the starting pistol. there is a wall 60m from the starter.
take the speed of sound as 330 m/s.
wall
not to
starter 60m scale
attiateg q ‘ athletics track
bp
see
siar
sia
siar
eg al
how long after firing the pistol does the starter hear the echo of the sound from the wall?
a 0.18s b 0.36s c 28s d 5.5s

24 the diagram shows the magnetic field around a conductor which is carrying a current.
where is the strength of the field greatest?
conductor carrying a
current into the paper
©)

25 a positive ion ina vacuum moves at a steady speed in a straight line.
there is a potential difference between the two parallel metal plates p and q so that they are
oppositely charged.
when the positive ion enters the region between plates p and q, it changes direction as shown.
the diagram shows the view from above the ion.
— | plate p
ci
a
peneee-------7""” positive ion
—§ 7; plate q
which diagram shows the direction of the electric field between the plates?
a b
p p
q q
cc d
p bp
q q

26 in the circuit shown, the voltmeter reads 2.0v. a charge of 5.0c passes through the resistor in a
certain time.
how much energy is supplied to the resistor in this time?
a 0.40j b 2.5j cc 10j d 20j

27 which diagram shows the current-voltage (i—v) graph for a filament lamp?

a b c d
in \4% lj —_
0 0 0 0

0 vv 0 vv 0 vv 0 vv

28 the diagram shows an electrical circuit.
ay 40
(a) —
: 30
a |

(a) —

which statement is correct?

a the current reading on ammeter a, is the highest.

b_ the current reading on ammeter az is the highest.

c_ the current reading on ammeter as is the highest.

d_ the current readings on all three ammeters a,, az and as are the same.

29 the diagram shows an arrangement of resistors in series and parallel.
r, r,
[|
which equation is used to calculate the combined resistance of the resistors?
a rafee™,
r,xr,
b r+ r,xr3
rz+r3
cc r, + 1
r,+r;
d ree ets
r,xr,

30 an electrical engineer has made a pair of components p and q.

the resistance of p decreases as the temperature rises. the resistance of q increases as the

temperature rises.

the total resistance of p and q in series remains constant when the temperature changes. the

two components are connected in series with a power source supplying a constant current.

which statement is correct?

a_ if a temperature change causes the potential difference (p.d.) across p to double, the p.d.
across q will always halve.

b_ the difference between the p.d. across p and the p.d. across q does not change with
temperature.

c_ the p.d. across component p increases as the temperature rises.

d_ the sum of the p.d. across p and the p.d. across q does not change with temperature.

31 the diagram shows a wire xy moving upwards in a magnetic field.
¥;
4
x
a current is induced in the wire.
the current-carrying wire xy experiences a force because of its interaction with the magnetic
field.
which row gives the direction of the induced current and the direction of the force experienced by
the wire xy?
direction of direction of
induced current the force
a from x to y downwards
b from x to y upwards
cc from y to x downwards
d from y to x upwards

32 diagram 1 shows a magnet being pushed into a coil that is connected to a centre-zero sensitive
voltmeter.
n
stationary
| magnet
0 5 0 pans 0
—— —— —=
or eer ae
——3 — ——4
——4 ——3 ——4
— 3 c— 3 — 3
rst a
centre-zero [s|
sensitive
voltmeter
s)
diagram 1 diagram 2 diagram 3
which row shows the directions of the pointer on the voltmeter when the magnet is as shown in
diagrams 2 and 3?
[| agama [gram |
1 oo} o
1 yo) o®
fo) y
oy) &y

33 what is the purpose of the brushes and the split-ring commutator in a d.c. motor?
a_ to change the size of the current
b_ to keep the coil turning in the same direction
c_ to keep the speed of rotation constant
d_ to make the output an alternating voltage

34 the diagram shows f-particles being directed between the poles of a magnet.
ly |
b-particles
seana
s)
in which direction will the particles be deflected?
a __ into the page
bout of the page
c towards the bottom of the page
d towards the top of the page

35 ana-particle and a b-particle have the same kinetic energy.

why does the a-particle have a larger ionising effect than the b-particle as it passes through air?

a_ the a-particle has a larger charge and a larger velocity so is closer to an air particle for a
shorter time.

b_ the a-particle has a larger charge and a smaller velocity so is closer to an air particle for a
longer time.

c_ the a-particle has a smaller charge and a larger velocity so is closer to an air particle for a
shorter time.

d_ the a-particle has a smaller charge and a smaller velocity so is closer to an air particle for a
longer time.

36 a student is carrying out an experiment to measure the radiation from a radioactive source.
he uses a radiation detector and records the total counts in 5-minute intervals. he does this three
times with the source present and three times with the source absent. here are his results.

5 minutes 5 minutes
with source present | with source absent
68 25
73 28
69 22
what is the average corrected count rate for the source?
a 5 counts/ minute
b  9counts/minute
c 25 counts/minute
d 45 counts/minute

37 the count rate measured near a radioactive source drops from 542 counts per minute to
94 counts per minute in 12 hours. the background count remains constant at 30 counts per
minute.

what is the half-life of the source?
a 2hours b 3 hours c 4hours d 8hours

38 what happens when a protostar becomes a stable star?
a_ most of the hydrogen is converted to helium and the protostar expands.
b_ the inward force due to gravity is balanced by an outward force due to the high temperature.
c_ the protostar collapses due to gravity and the temperature increases.
d_ the protostar runs out of hydrogen as fuel for the nuclear reaction.

39 the table gives information about some of the planets in our solar system.
mass compared average density gravitational field strength at surface
earth 1.0 5.5 9.8
jupiter 320 1.38 25
mercury 0.060 5.4 3.8
uranus 15) 1.3 10
which statement about these planets is correct?
a as the mass compared with the earth increases, the average density increases.
b_ as the mass compared with the earth increases, the gravitational field strength increases.
c_ as the average density increases, the gravitational field strength decreases.
d_ the average density is directly proportional to the gravitational field strength.

40 which quantity is an estimate of the age of the universe?
a ho b dx mh @ d vxm
ho

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