physics

1 a paperback book contains 210 sheets of paper (pages). its thickness is measured with a ruler,
as shown.
r*
0 1 2 3 4 5 6
cm
what is the average thickness of one sheet of the paper in the book?
a 0.013mm b  0.017mm c 0.13mm d 0.17mm

2  whatis the unit of resistance when expressed in si base units?
a kg'm?sa?
b kg'm’s°a’
c kgm’s'a?
d kgm’s°a?

3 which list consists only of scalar quantities?
a acceleration, displacement, force, weight
b_ density, energy, frequency, velocity
c_ distance, pressure, temperature, time
d momentum, power, volume, wavelength

4 the output of a signal generator is connected to a cathode-ray oscilloscope (cro). a trace is
shown on the screen.
ppe ee ee ey fcc
oe
1.0cm
the time-base of the cro is set at 2.00 mscm™.
what is the frequency of the signal?
a 50hz b 125hz c 250hz d 500hz

5 after measuring the width of a shelf to be 305mm, it is found that the graduations on the ruler
used are 1.0% further apart than they should be.
which type of measurement error is this and what is the true width of the shelf?
| | type of error true width/mm
a random 302
b random 308
cc systematic 302
d systematic 308

6 the graph shows the variation with time of the acceleration of a car.
acceleration
0
0 time

what must the shaded area under the graph represent?
a the average velocity of the car
b_ the change in velocity of the car
c the final velocity of the car
d _ the initial velocity of the car

6 water is pumped througn a hose-pipe at a rate of y0kg per minute. water emerges horizontally
from the hose-pipe with a speed of 20ms™.
what is the minimum force required from a person holding the hose-pipe to prevent it moving
backwards?
a 30n b 270n c 1800n d 110000n

9 askydiver leaves a stationary balloon and falls vertically through a long distance.
which graph best represents the variation of the acceleration a of the skydiver with the distance s
travelled as she falls through the air?

a b
a a
0 0
0 s 0 =
c d
a a
0 0
0 2 0 =

10 ihe diagram shows two spheres approacning each other head-on. each sphere has speed u.
one sphere has mass 2m and the other has mass m.
gu —j~e =m — u
which diagram shows the result of a perfectly elastic collision?
a b
: u 5u : : u 2u :
=— — — - <=—_ = =
3 3 6 3
cc d
u —_—_—__ 2u oe u ——_—_—_—_—
6 3 3
the spheres stick together

11 aspherical object falls through water at a constant speed. three forces act on the object.
which diagram, showing these three forces to scale, is correct?
a b cc d

12 two forces act as a couple.
which statement about the two forces must not be correct?
a they act along the same straight line.
b_ they act in opposite directions.
c_ they are the same type of force.
d_ they have the same magnitude.

13 assign outside a shop is suspended from a rusty horizontal hinge at its top end. the sign hangs in
equilibrium at an angle of 25° to the vertical, as shown.
hinge

(25°

sign
the sign is a square of side length 52cm and uniform thickness. it has a mass of 36 kg.
what is the moment of the weight of the sign about the hinge?
a 39nm b 78nm c 83nm d 92nm

14 a uniform rod of length 200cm is freely pivoted at point p. the rod is held horizontally in
equilibrium by a 60n weight that is attached to the rod by a string passing over a frictionless
pulley.

string frictionless
- 40cm | uniform rod (©) pulley
a
1 80°
ee. ee
. 200cm ,
os [4 weight
60n
what is the weight of the rod?
a 30n b 60n c 80n d 140n

15 the diagram shows two blocks x and y.
block x block y
\\ a —
ws ;
| | 7
a 2
tae ‘ 2a ‘
—_ et
a
block x has sides of length a. when block x is placed in a liquid of density » with the shaded face
level with the liquid surface, it experiences an upthrust u.
block y has horizontal sides of length a and 2a and height +a. block y is placed in a liquid of
density 2,, also with the shaded face level with the liquid surface.
what is the upthrust on block y?
a 4u b u cc 2u d 4u

16 agas is contained inside a syringe, as shown.
syringe
gas
the initial volume of the gas is 2.00 cm’.
atmospheric pressure is 101 kpa.
what is the work done by the gas on the atmosphere when the gas is heated and expands to a
volume of 6.00 cm??
a 404,uj b 404mj c 404j d 404kj

17 a mechanical device does useful work at rate x and wastes energy at rate y.
which expression gives the efficiency of this device?
aa x gp @-) c _x_ py ie
y¥ y (x+y) (x+y)

18 car p has kinetic energy 240 kj.
car q has half the mass and twice the speed of car p.
what is the kinetic energy of car q?
a 120kj b 240kj c 480kj d 960kj
i ee ee ” eee —c™eeennu

19 a water pump is driven by an engine. the pump raises a volume of 0.50 m° of water in 1.0 minute
from a depth of 30m. the pump has an efficiency of 70%.
the density of water is 1000 kgm™.
what is the useful output power from the engine?
a 2.5kw b 3.5kw c 150kw d 210kw

20 which spring combination has an overall spring constant of 8.0 nm‘?
a b
extension ; ;
=0.20m extension extension
=0.075m =0.075m
extension
=0.20m 1.2n
1.6n
cc d
extension extension extension extension
=0.075m =0.075m =0.075m =0.075m
; extension extension
extension = 0.075m =0.075m
=0.15m
1.8n 2.4n

21 a metal wire is stretched to breaking point and the force—extension graph is plotted.
which graph is correctly labelled with the elastic region, the plastic region and the area
representing the work done to stretch the wire until it breaks?
a b
plastic elastic
elastic region plastic region
— region fores region
perk done work done
0 : 0
0 extension 0 extension
cc d
plastic plastic
elastic region elastic region
region region
force 9 force iy
work done work done
0) ()
0 extension 0 extension

22 a longitudinal wave travels through a long spring. the spring is shown at one instant.
what is the wavelength of the wave?
spring
t & |
—_—— 1 1 '
b
é
! d

23 which statement about waves is correct?
a both longitudinal and transverse waves can travel through a vacuum.
b both longitudinal and transverse waves transfer matter.
c longitudinal progressive waves consist of alternate nodes and antinodes.
d_ the particles of a transverse wave vibrate perpendicular to the direction of energy
propagation.

24 a stationary sound wave is formed in a pipe that is closed at one end and open at the other end.
the wave has two antinodes. one of these antinodes is at the open end of the pipe.
the length of the pipe is 0.600 m. the speed of sound in the air column in the pipe is 340ms™.
what is the frequency of the sound wave?
a 425hz b 850hz c 1130hz d 2270hz

29 a train travels at constant speed along a straight track. ihe trains horn emits sound of frequency
500 hz.
a person standing by the side of the track hears sound of frequency 450 hz.
the speed of sound in air is 340ms"'.
what is the speed of the train and in which direction is it travelling relative to the person?
| speedims® | arecion
a 34 away from the person
b 34 towards the person
cc 38 away from the person
d 38 towards the person

26 a smooth surface has dumps on the surface that are smaller than the wavelengih of visible light.
what is the approximate maximum size of the largest bumps on the surface?
a 20nm b 350nm c 720nm d 5.0um

27 two progressive waves travel in opposite directions and form a stationary wave. the graph
shows the variation with distance x of the displacement of the stationary wave and of one of the
two progressive waves at the same instant in time.

progressive wave

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displacement eee begarecer ee eeeceeeeeeec ace

eee ee eee ee ee rae ee eere eee eee ee eee gases ene

/mm 5 se en se as

ss ey a

eere ces pele ezekiel nee cele lea

lee en eee yee ree pn eea

0 tered wee ae eee de eee see ane e ee

oleh speea ee toca bree 0-h 25

susu ga coy dee” duseuueuss vaauacee?a55/

—5 -erceeeeerbretheececeeeeer echr eee

ge teeshd cdhabddtecdosti cater fosatosttoatee

eere ecap ce areer cece

—~10 as 0 a a

stationary wave
what are the approximate displacements of the other progressive wave at the positions j, k
and l?
displacement/mm

a -5 0 —-10
b -5 +5 0
cc 0 +5 +10
d +5 -5 0

28 which diagram shows the diffraction of water waves in a ripple tank?
a b
cc d

29 interference fringes are produced on a screen by double-slit interference using light of
wavelength 600 nm. the fringe separation is 4.0mm and the separation of the slits is 0.60 mm.
what is the distance between the double slit and the screen?

a 0.25m b 0.40m cc 2.5m d 4.0m

30 a ray of green light is incident normally on a diffraction grating. several bright spots are produced

ona screen on the other side of the grating, as shown.

bright spots

ray of
green light
diffraction
grating
not to scale
screen

which pair of changes could result in bright spots at exactly the same angles as previously?
a_ use blue light and increase the distance between the grating and the screen.
b_ use blue light and increase the number of lines per unit length in the grating.
c_ use red light and increase the distance between the grating and the screen.
d_ use red light and increase the number of lines per unit length in the grating.

31 two parallel metal plates are at electric potentials of +800 v and +1300v.
which diagram best represents the electric field between the metal plates?
a b
+800v +1300v +800v +1300v
cc d
+800v +1300v +800v +1300v

32 an electron is in a uniform electric field of field strength 1500vm™.
what is the acceleration of the electron due to the electric field?
a 85x10°ms?
b 1.6x10°ms®
c 1.4x10'ms®
d 2.6x10“%ms*
es

33 a lightning strike transfers 1 x 10°" electrons past a point in a time of 30 us.
what is the average current during the lightning strike?
a 0.5ma b 0.5a c 500a d 500ka

34 a cell has an electromotive force (e.m.f.) of 6v and internal resistance r. an external resistor,

also of resistance r, is connected across this cell, as shown.

| 6v

r

harmed

power p is dissipated by the external resistor.
the cell is replaced by a different cell that has an e.m.f. of 6v and negligible internal resistance.
what is the new power that is dissipated in the external resistor?
a 0.5p b p c 2p d 4p

35 avwire of uniform cross-section has resistance r.
a second wire is made of the same material but is twice as long and has twice the diameter of the
first wire.
what is the resistance of the second wire?
a rf br cr d 8r
8 2

36 the diagram shows two resistor networks.
network 1 network 2
2r r
[| [|
r 2r
[| [|
what is the ratio total resistance of network 1 2
total resistance of network 2
a = b 5 e i pd 2
5 4 2 1

37 the circuit shown contains three cells of electromotive forces 3.0v, 2.0v and 4.0v, in series with
a resistor of resistance 5.0 q. the cells have negligible internal resistance.
3.0v
5.00
i ! 4 4.0v
2.0v
what is the current j in the circuit?
a 0.20a b 0.60a c 1.0a d 1.8a

38 when a-particles are fired at a thin metal foil, most of the particles pass straight through but a few
are deflected by a large angle.
which change would increase the proportion of a-particles deflected by a large angle?
a using a-particles with greater kinetic energy
busing a double thickness foil
c using a foil made of a metal with fewer protons in its nuclei
d using a source emitting more a-particles per unit time

39 a nucleus of neptunium-236 contains 93 protons and 143 neutrons. this nucleus decays with the
emission of an a-particle. the nucleus formed then emits a 6 particle.
which diagram shows the changes in the number p of protons and the number n of neutrons in
these nuclei?
a b
146 146
mot ttt tt ot et et
wel | 14 wo | be
a ||| | | et | | |
vol la ltt volt | lt
we ot le ttt
138 | 138
90 92 94 96 90 92 94 96
p p
cc d
146 146
moot | tt ea ot tt tt tt
wot || pls vol | bet tt
vet ele <a
ot le ttt «pc
138 138
90 92 94 96 90 92 94 96
p p

40 which combination of quarks could not be the quark composition of the hadron shown’?
p = proton
n = neutron
> = sigma particle of charge —e
>’ = sigma particle of charge +e
u = up quark
d = down quark
s = strange quark
tin coat |

a pe dds

b » uds

cc p uud

d n udd

Solve 9702_w21_qp_13