physics

1 forces of 3n and 4n act at right angles, as shown.
x ee ¥
3n ! ‘ot :
what is the resultant force?
a 1nalong xz
b 5nalong xz
c 5nalong oy
d 7nalong oy

2  a\light ball is held at rest at the top of a tall cliff. it is released and falls through the air, eventually
reaching its terminal velocity.
which row describes the behaviour of the ball as it descends?
the initial the final
acceleration | acceleration
of the ball of the ball
a 0 0
b 0 g
cc g 0
d g g

3. the graph represents the motion of a car.
10
6
4
2
0
0 1 2 3. 4 5
time/s
how far has the car moved between 0 and 5s?
a 2m b 10m c 25m d 50m

4 which statement about mass or weight is not correct?
a masses can be compared using a balance.
b_ mass is a force.
c weights can be compared using a balance.
d_ weight is a force.

5  asphere p, made of steel, has a weight of 10n on earth.
another sphere q, also made of steel, has a weight of 10 n on mars.
the gravitational field strength on earth is greater than the gravitational field strength on mars.
which statement is correct?
a_ the mass of sphere p is the same as the mass of sphere q.
b_ the mass of sphere p is less than the mass of sphere q.
c on mars, the weight of sphere p is the same as the weight of sphere q.
d on earth, the weight of sphere q is less than 10n.

6 which two quantities must be known to determine the density of a material?
a mass and area
b- mass and volume
c_ weight and area
d_ weight and volume

7 a truck is towing a car along a straight horizontal road at a constant speed.
truck
car
rope
zag ss a=
st>~, | tn _ la
i
the rope breaks.
which row gives the direction of the initial acceleration of the truck after the rope breaks and the
reason for the acceleration?
direction of
acceleration reason
of the truck
a left the driving force is greater than
the resistive forces on the truck
b left the driving force is smaller than
the resistive forces on the truck
cc right the driving force is greater than
the resistive forces on the truck
d right the driving force is smaller than
the resistive forces on the truck

8 a.uniform beam is pivoted at the centre and two identical masses, x and y, are placed so that the

beam balances.
a smaller mass is then added at the position shown.

position of

small mass

xx / y

not.
how can the masses be positioned so the beam balances again?
a move x away from the pivot.
b move x towards the pivot.
c move y towards the pivot.
d move the small mass away from the pivot.

9 a resultant force of 2.0n acts on an object of mass 3.0 kg for 6.0s.
what is the change in velocity of the object?
a 0.25m/s b 1.0m/s c 4.0m/s d 36m/s

10 the diagram shows the energy stores for a mobile (cell) phone and how the energy is transferred
between stores.
chemical energy
energy kinetic
energy
what describes how the chemical energy is transferred?
a electrical work done
b~ mechanical work done
c_ electromagnetic waves
d_ sound waves

11. awind turbine is 30% efficient and has an output of 2.5 mw of electrical power.
what is the power input to the turbine?
a 0.75mw b 8&.3mw c 75mw d 83mw

12 which two physical quantities must be used to calculate the power developed by a student
running up a flight of steps?
a force exerted and the vertical height of the steps only
b__ force exerted and the time taken only
c_ work done and the vertical height of the steps only
d_ work done and the time taken only

13 the density of sea water is 1030kg/m*.
the gravitational field strength on the earth is 9.8 n/kg.
atmospheric pressure is 101 000 pa.
at which depth in sea water is the total pressure due to the atmosphere and the water equal to
513000 pa?
a 40.8m b 50.8m c 400m d 498m

14 four students describe the phrase ‘absolute zero’ during a lesson on the particle model.
which student is correct?
a this is the lowest possible temperature.
b_ particles in a solid start vibrating.
c_ particles do not have any weight.
d_ particles have the least gravitational potential energy.

15 four students are asked to state and explain the relative magnitudes of the thermal expansion of
solids and gases.
which student is correct?
a_ gases expand more than solids because the molecules in a gas are in random motion.
b gases expand more than solids because the attractive forces between molecules are much
weaker in gases.
c_ solids expand more than gases because the molecules are closer together in solids.
d_ solids expand more than gases because the molecules in a solid are in a regular pattern.

16 four cups a, b, c and d contain hot coffee.
which cup keeps the coffee warm the longest?
pe eee
a black covered with a lid
b black no lid
cc white covered with a lid
d white no lid

17 the diagram shows a wave.
8cm
$$
3cm
gight | fesse ree a eee teeta eine
'
‘ 4cm ‘
what are the amplitude and the wavelength of this wave?
| | amplitude /cm wavelength/cm
a 3 4
b 3 8
cc 6 4
d 6 8

18 optical fibres are used to transmit digital signals using infrared radiation.
the average refractive index of the fibres is 1.50.
which row describes a digital signal and gives the speed of infrared radiation in the fibres?
- ‘ speed of infrared radiation in the fibres
digital signal
m/s
a a signal that consists 2.0 x 10°
of only two values
b a signal that consists 4.5 x 10°
of only two values
cc a signal that consists of 2.0 x 10°
a continuous range of values
d a signal that consists of 4.5 x 108
a continuous range of values

19 which statement describes monochromatic light?
a light of a single frequency
b _ light transmitted by a transparent prism
c visible light
d_ white light

20 a beam of light consists of yellow and blue light.
the beam of light is incident on a glass prism.
which diagram is correct?
a b
yellow blue
blue yellow
glass prism glass prism
cc d
glass prism glass prism
blue yellow
yellow blue

21 aradio station broadcasts a signal with a frequency of 89 mhz.
what is the wavelength of this signal?
a 3.7um b 3.4m c 3.7km d 3.4mm

22 a boy shouts and hears the echo from a tall building 2.2 later.
the speed of sound in air is 330 m/s.
how far away from the boy is the building?
a 150m b 300m c 360m d 730m

23 the magnetic field of a bar magnet can be represented by magnetic field lines.
which diagram shows two magnetic field lines correctly?
a b cc d

24 aplastic rod is rubbed with a dry cloth. the rod becomes positively charged.
why has the rod become positively charged?
a it has gained electrons.
b_ it has gained neutrons.
c_ithas lost electrons.
d_ it has lost neutrons.

25 which statement about electric current in a conductor is correct?
a inad.c. circuit, the electric current gradually decreases along the conductor.
b_ inad.c. circuit, the free electrons flow back and forth.
c_ inanaz.c. circuit, the electric current remains exactly the same all the time.
d_ inanazc. circuit, the flow of charge changes direction continually.

26 a piece of metal wire x with a uniform diameter has resistance r.
xx
a second piece of wire y is made of the same metal and has a uniform diameter.
y has double the cross-sectional area of x and half the length of x.
y
what is the resistance of y?
a & g & cr d 4r
4 2

27 an electric fire is connected to a 240v supply and transfers energy at a rate of 1.0 kw.
how much charge passes through the fire in 1.0h?
a 42c b 250c cc 15x 10°c d 2.4x 10°c

28 two lamps are connected in parallel.
s, s,
s,

which switches must be closed so that both lamps light?

a s, and s; only

bs, and s; only

c sz and ss; only

d si, so and $3

29 the diagram shows a circuit that switches on a lamp when there is a change in the environment.
which change in the environment causes the lamp to be switched on?
a adecrease in light intensity
b  adecrease in temperature
c_anincrease in light intensity
d_anincrease in temperature

30 a step-down transformer is 100% efficient. it has an input voltage of 240v a.c. and an output
voltage of 60v a.c.
the current in the primary coil is 0.50a.
what is the current in the secondary coil?
a 0.13a b 0.50a c 2.0a d 8.0a

31 the diagram shows the pattern of the magnetic field due to the current j in a straight wire.
i
y
ci>a p
i
x |
which row is correct?
—" relative
| direction of field strength of field
a xx greater at p than q
b ¥ greater at p than q
cc x greater at q than p
d ¥ greater at q than p

32 in which device is the magnetic effect of a current not used?
a electromagnet
b_ loudspeaker
c potential divider
d_ relay

33 fission and fusion are two types of nuclear process.
how does the total mass of the nuclides produced compare with the total mass of the original
nuclide or nuclides in these nuclear processes?
total mass of fission total mass of fusion
products compared products compared
to original nuclide to original nuclides
a same same
b more less
cc less more
d less less

34 the table shows the composition of three different nuclei.
number of | number of
nucleus
protons neutrons

x 3 3

y 3 4

z 4 3
which nuclei are isotopes of the same element?
a x,y andz b xandyonly c xandzonly d = yandzonly

35 which change occurs in the nucleus of a radioactive atom during b-emission?
a a neutron transforms into a proton and an electron.
ba neutron transforms into a proton only.
c_ a proton transforms into a neutron and an electron.
da proton transforms into a neutron only.

36 a radioactive isotope has a half-life of 8 days.
a detector close to a sample of this isotope gives a count rate of 200 counts per minute.
without the source, the background count is 20 counts per minute.
what is the count rate due to the source after 8 days?
a 80 counts per minute
b 90 counts per minute
c 100 counts per minute
d 110 counts per minute

37 which statement about the solar system is correct?
a all the planets are rocky.
b only the earth has a moon.
c_ pluto is a dwarf planet.
d_ there are many stars in the solar system.

38 comets are bodies which orbit the sun in the solar system.
what is the shape of the orbit and how is the sun positioned within the orbit?
[shape afoot [poston ote s|
a circular centre of orbit
b circular not at centre of orbit
cc elliptical centre of orbit
d elliptical not at centre of orbit

39 which nuclear reaction produces the release of energy to power a star?
a nuclear fission of helium into hydrogen
b nuclear fission of hydrogen into helium
c nuclear fusion of helium into hydrogen
d nuclear fusion of hydrogen into helium

40 what is the definition of the hubble constant?
a the ratio of the speed at which a galaxy is receding from the earth to its distance from the
earth
b _ the value of the change in wavelength of the galaxy’s starlight due to redshift
c_ the constant used to represent the rate of expansion of the universe in all directions
d_ the estimated constant equal to the age of the universe

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