BMAT - Physics

7/23/2019 BMAT - Physics

http://slidepdf.com/reader/full/bmat-physics 1/33

5

BMAT Section 2 © UCLES 2009 [Turn over

3 Shortly after opening her parachute, a free-fall parachutist of mass 60kg experiences the forcesshown in the diagram.

weight = 600N

Which line in the table gives the size and direction of the acceleration of the parachutist at thisinstance?

size of acceleration (m/s2) direction of acceleration

A 5.0 downwards

B 10.0 downwards

C 5.0 upwards

D 10.0 upwards

E 0.0 -

BMAT 2009 - Section 2 - Physics .pdf



7

BMAT Section 2 © UCLES 2009 [Turn over

7 Which of the following is a correct unit of potential difference (voltage)?

A amp per ohm

B coulomb per joule

C joule per second

D newton per coulomb

E watt per amp




11 It is known that a radioactive source emits a single type of radiation. Detectors are placed inthe two positions shown. The graph shows how the readings change over time.

source

30cm

1m

detector 2

detector 1

c o u n t r a t e ( c o u n t s / m i n )

240

220

200

180

160

140

120

100

80

60

40

20

0

detector 1

detector 2

time (hours)

161514131211109876543210

Which type of radiation does the source emit, and what is its half-life?

type of radiation half-life (hours)

A alpha 2.40

B alpha 2.76

C beta 2.40

D beta 2.76

E gamma 2.40

F gamma 2.76




15 The graph represents the motion of a vehicle during part of a journey.

time (min)

876543210

s p e e d ( m / s )

30

20

10

0

What is the best estimate of the distance travelled during the part of the journey shown?

A 100.00m

B 107.50m

C 115.00m

D 6.00km

E 6.45km

F 6.90km




BMAT Section 2 © UCLES 2009

19 An object of mass 5kg falls from rest and hits the ground at a speed of 20m/s. Air resistance isnegligible.

From what height has the object fallen?

Take g to be 10m/s2

A 10m

B 20m

C 50m

D 100m

E 200m

F 1000m

23 A train consists of a powered engine pulling two unpowered carriages.

carriage 2 carriage 1 powered engine

T 15000N

The engine has a mass of 20000kg, and each carriage has a mass of 5000kg. When the engineaccelerates from rest it develops a thrust (driving force) of 15000N as shown.

Ignoring resistive forces, what is the tension (pulling force) T in the coupling between carriage 1 andcarriage 2?

A 2500N

B 3750N

C 5000N

D 7500N

E 15000N




19

27 The first graph shows the variation of the displacement of particles with distance along a wave at aparticular instant in time:

d i s p l a c e m e n

t ( m m ) 18

0

-18

60

distance (m)

The second graph shows the variation with time of the displacement of a particular particle in thiswave:

d i s p l a c e m e n t ( m m

) 18

0

-18

0.6

time (s)

What is the speed of this wave?

A 30m/s

B 50m/s

C 90m/s

D 100m/s

E 150m/s

F 300m/s




3 In a laboratory experiment, protactinium-234 undergoes radioactive decay by β-emission intouranium-234.

The table below describes how the mass of uranium-234 present in the sample varies with timefrom the start of the experiment:

time / min mass of u-234 / mg

0.0 0.0

1.2 8.0

2.4 12.0

3.6 14.0

4.8 15.0

6.0 15.5

7.2 15.7

8.4 15.9

9.6 15.9

10.8 16.0

12.0 16.0

Using the information in the table, approximately what is the half-life of protactinium-234?

A 1.2 minutes

B 2.4 minutes

C 6.0 minutes

D 9.6 minutes

E 10.8 minutes

F 12.0 minutes




7 The depth of water in a particular tidal harbour varies with time as shown in the graph:

time / hours

26242220181614121086420

d e p t h / m e t r e s

20

18

16

14

12

10

8

6

4

2

0

If the variation in depth caused by the effect of the tide is considered as a wave, what are theamplitude and frequency of this wave?

amplitude / metres frequency / hertz

A 3 1/(12 x 3600)

B 3 3600/12

C 6 1/(24 x 3600)

D 6 3600/24

E 8 1/(12 x 3600)

F 8 3600/12

G 16 1/(24 x 3600)

H 16 3600/24




11 When radioactive isotopes decay, they sometimes have to go through a succession ofdisintegrations to reach a stable isotope. These are called decay chains, and involve thesuccessive emission of numerous α and/or β particles.

One such isotope is radon-219 ( 219

86Rn), which goes through a chain in which three α particles

and two β particles are emitted before reaching a stable isotope.

What are the atomic and mass numbers of the resulting stable isotope?

atomic number mass number

A 80 207

B 80 211

C 82 207

D 82 215

E 85 211

F 85 219

G 86 215

H 86 219

27 A car of mass 800kg moves up an incline of 1 in 20 (1 in 20 means for every 20m along the roadthe car gains 1m in height) at a constant speed of 20m/s. The frictional force opposing motion is500N.

How much work has been done by the engine after the car has moved 50m?

A 20kJ

B 25kJ

C 27kJ

D 45kJ

E 65kJ

F 160kJ




15 The circuit shows five identical filament bulbs designed to work at 12V connected in a circuitwith two switches. Switch P is initially open and switch Q is initially closed.

switch P

bulb Ybulb X

switch Q

12V

Switch P is then closed and switch Q is opened.

Compared with their brightness before these changes were made, how has the brightness ofbulbs X and Y changed?

bulb X bulb Y

A brighter brighter

B brighter dimmer

C dimmer brighter

D dimmer dimmer

E unchanged brighter

F brighter unchanged




19 The diagrams below show velocity-time or distance-time graphs for 4 different objects, P, Q, Rand S.

time / s

322824201612840

v e l o c i t y /

m / s

12

10

8

6

4

2

0

P

time / s

24201612840

v e l o c i t y /

m / s

70

60

50

40

30

20

10

0

Q

time / s

6543210

d i s t a n c e / m

14

12

10

8

6

4

2

0

R

time / s

240180120600

d i s t a n c e / m

175

150

125

100

75

50

25

0

S

Which graph(s) show an object accelerating at 2.4m/s2?

A P only

B Q only

C R only

D S only

E P and Q

F Q and R

G P and S




3 Two identical cars, P and Q, start at the same level. Car P moves at a constant speed of 10m/s up a

hill to a height of 25m in a time of 20s. In the same time car Q moves at a constant speed of 20m/s upa hill to a height of 50m.

What are the kinetic energies of the cars while they are travelling up the hills, and what are theirgravitational potential energies once they have reached the top?

kinetic energy gravitational potential energy

A car Q has twice as much as car P car Q has twice as much as car P

B car Q has twice as much as car P car Q has four times as much as car P

C car Q has four times as much as car P car Q has twice as much as car P

D car Q has four times as much as car P car Q has four times as much as car P

7 Which one of the following statements about nuclear physics is true?

A The process of emission of a gamma ray from a nucleus is called nuclear fission.

B The half life of a radioactive substance is half the time taken for its nuclei to decay.

CThe number of neutrons in a nucleus is its atomic number (proton number) minus itsmass number.

D The process used in nuclear power stations is nuclear fusion.

EWhen a nucleus emits a beta particle, there is no change in the number of particles itcontains.

FWhen a nucleus emits an alpha particle, one of its neutrons becomes a proton plus anelectron.




11 Consider this circuit.

A

3Ω 3Ω

6V

Which line in the table gives the current flowing in the ammeter, in amps, when the switch isopen, and when it is closed?

ammeter reading/A

switch open switch closed

A 0.0 1.0

B 0.0 2.0

C 1.0 0.0

D 1.0 1.0

E 1.0 2.0

F 2.0 0.0

G 2.0 1.0

H 2.0 2.0




15 A bullet of mass 50g is fired from a rifle with a velocity of 300m/s. It hits a bank of earth and aftertravelling 60cm into the bank comes to rest.

What is the average stopping force of the earth in the bank on the bullet?

A 37.5N

B 3.75 x 103N

C 3.75 x 104N

D 3.75 x 106N

23 A ray of orange light travelling through air has a speed of 3.0 x 108m/s and a wavelength of600nm. (1nm = 10-9m)

What could be the speed, frequency and wavelength of this orange light when travelling throughglass?

Speed/ms-1 Frequency/Hz Wavelength/nm

A 2.0 x 108 3.3 x 1014 400

B 2.0 x 108

3.3 x 1014

600

C 2.0 x 108 5.0 x 1014 400

D 2.0 x 108 5.0 x 1014 600

E 3.0 x 108 3.3 x 1014 400

F 3.0 x 108 3.3 x 1014 600

G 3.0 x 108 5.0 x 1014 400

H 3.0 x 108 5.0 x 1014 600




19 Which graph correctly shows how the resistance (R) varies with applied voltage (V) for a resistorat constant temperature?

A

0

0

R

V

B

0

0

R

V

C

0

0

R

V

D

0

0

R

V

E

00

R

V

F

00

R

V




27 At the front of a long column of soldiers is a man regularly hitting a drum 50 times a minute. Thesoldiers are told to place their left foot down on the ground when they hear the drum beat. Thecolumn is so long that the soldiers at the back put down their left feet at the same time as thesoldiers in the front put down their right feet.

What is the minimum length of the column of soldiers?

[Speed of sound in air is 330m/s]

A 165m

B 198m

C 330m

D 396m

E 660m

F 792m




3 Nuclide X N

R is an unstable isotope which decays in two stages into nuclide Z as shown:

Z Y X P

Q

P

R

N

R →→−2

What are the values of P and Q?

P Q

A N - 4 R + 1

B N - 4 R - 1

C N - 4 R - 2

D N R - 1

E N R - 2

F N R - 4




7 Students investigate a radioactive source. They place a detector close to a radioactive sourceand take 5 readings over 5 minutes. They then place a thin sheet of paper between the detectorand the source, and again observe the counts over 5 minutes. Lastly they replace the papersheet with an aluminium one and observe the counts over 5 minutes. Their results are shownbelow:

Nothing Paper Aluminium

Reading 1 100 101 30

Reading 2 98 102 31

Reading 3 99 96 28

Reading 4 103 101 33

Reading 5 101 103 27

What type(s) of radiation is being given off by the source?

A α only

B β only

C γ only

D α and β

E α and γ

F β and γ




11 The diagrams show, not to scale, three different situations in which a force F acts. Also shown ineach case is a distance d .

Diagram 1:Person sitting on a chair

Diagram 2:Wheelbarrow being lifted

Diagram 3:Weight being lifted by a motor

Which line in the table shows whether or not work is being done by force F in each situation and, ifso, whether the work done is equal to F x d ?

Work being done by force F ? Work done = F x d ?

A only in diagrams 1 and 2 only in diagram 1

B only in diagrams 1 and 2 only in diagram 2

C only in diagrams 2 and 3 only in diagram 2

D only in diagrams 2 and 3 only in diagram 3

E in diagrams 1, 2 and 3 only in diagrams 1 and 2

F in diagrams 1, 2 and 3 only in diagrams 2 and 3

G only in diagrams 1 and 3 only in diagram 1

H only in diagrams 1 and 3 only in diagram 3




15 The microwaves generated in a microwave oven travel through air at a speed of 3.0 x 108m/s,with a wavelength of 12cm. They pass through plastic food containers, but at a reduced speedof 2.0 x 108m/s.

What are the wavelength and frequency of these microwaves as they pass through a plasticfood container?

Wavelength (cm) Frequency (Hz)

A 8 1.7 x 109

B 8 2.5 x 109

C 8 3.8 x 109

D 12 1.7 x 109

E 12 3.8 x 10

9

F 18 1.7 x 109

G 18 2.5 x 109

H 18 3.8 x 109




19 The circuit shows three lamps and two ammeters in a circuit.

Lamp X 'blows' (the filament breaks).

What happens to the reading on each ammeter, and to the total resistance of the circuit?

Reading onammeter 1

Reading onammeter 2

Total resistanceof circuit

A decreases decreases decreases

B decreases decreases increases

C decreases increases decreases

D decreases increases increases

E increases decreases decreases

F increases decreases increases

G increases increases decreases

H increases increases increases




23 A cyclist and a bike have a combined mass of 100kg. The cyclist free-wheels (rolls withoutpedalling) at a constant speed of 0.8m/s down a 1 in 10 slope (this means that the cyclistdescends 1.0m for each 10m travelled along the road, as shown in the diagram.)

Calculate the loss in gravitational potential energy as he loses 100m in vertical height andhence calculate the total resistive force on the cyclist.[g = 10N/kg]

Loss in gravitationalpotential energy (J)

Resistive force (N)

A 3200 23.

B 3200 9932

C 3200 10032

D 100 000 100

E 100 000 991000

F 100 000 1011000




27 A sound wave is produced by a loudspeaker cone, which creates pulses of pressure by movingback and forth between two points X and Y as shown in the diagram.

The distance between points X and Y is 5.0mm and the loudspeaker produces pulses ofpressure every 0.2 milliseconds.

The following statements about the sound wave produced are made:

P It has a speed of 25m/s

Q It has an amplitude of 5.0mm

R It has a wavelength of 5.5mm

S It has a fundamental frequency of 5.0kHz

Which of these statements can be correctly deduced from the information given?

A P only

B P and Q only

C P and R only

D P, R and S only

E Q and S only

F R and S only

G S only




2 The mass of an atom of uranium is 4 10-25 kg.

What is the mass, in milligrams, of 8 million atoms of uranium?

A 3.2 10-18

B 3.2 10-17

C 3.2 10-16

D 3.2 10-15

E 3.2 10-12

4 The diagram shows a uniform beam pivoted at its centre. The bar weighs 800N, and three

other forces act on it as shown. Distance x can be varied.

x

500N200N

20cm40cm

200N

What value of distance x would cause the beam to be balanced?

A 5 cm

B 10 cm

C 20 cm

D 30 cm

E 40 cm

6 A horse of weight 6000 N gallops at a speed of 16 m/s. Taking the acceleration of free fall

as 10 m/s2, calculate the kinetic energy of the horse. (Give your answer in kJ.)




8 Three resistors of equal value are connected up as shown.

A B C D

Arrange the letters corresponding to the four combinations in increasing order of resistance

(least resistance first).

11 Three of the characteristic phenomena demonstrated by waves are reflection, refraction and

diffraction.

How many of these phenomena cause the frequency of the wave to change?

A 0

B 1

C 2

D 3

15In an experiment concerning radioactive decay, the count rate of radiation 5 cm from asource X was measured as 140 counts per minute. 12 minutes later, with the detector in the

same position, the count rate was measured as 35 counts per minute.

Background radiation was recorded as 20 counts per minute.

Calculate the half-life of source X. (Give your answer in minutes.)

17 Which one of the following is not equal to volts?

Acoulombs

joules

B ohmsamperes

Camperes

watts

D ohmswatts

Ecoulombs

watts




19 The energy in joules ( E ) associated with a photon of radiation is related to its frequency in

hertz ( f ) by the equation: f = E /h where h is a constant (6.63 10-34). What is the energy of a

photon of radiation if 5 waves of this radiation are produced in 1 10-13 sec?

A 1.33 10-21 J

B 6.63 10-21 J

C 3.32 10-20 J

D 1.51 1046 J

E 7.54 1046 J

22 In an a.c. generator driving a resistive load a coil is rotated slowly between the poles of a

magnet. Which of the following will increase if the coil is rotated more quickly?

1 the frequency of the a.c.

2 the amplitude of the a.c.

3 the output e.m.f. of the generator

A 1

B 1 and 2

C 1 and 3

D 2 and 3

E 1, 2 and 3

29 In triangle PQR

QPR = 60

PQR = 45

QRP = 75

RQ = 6 units

Given that cos 60 is ½, find the length of side PR. (The diagram is not drawn to scale.)

A 2

B 3

C 2

D 6

60°

45°

75°

6

P

Q

R




BMAT 2003: Section 2

21 Diagrams 1 to 5 show five types of levers.

load

effort

fulcrum

1

load

effortfulcrum

2

load

effortfulcrum

3

loadeffortfulcrum

4

load effortfulcrum

5

Diagram 6 shows the bones of the arm with arrows showing its movement up and down.

up

down

6

Which two levers would be involved in the forcible up and down movement?

up down

A 1 2

B 1 3

C 2 3

D 3 4

E 3 5

F 5 2




27 A parachutist falls from an aircraft and reaches a terminal velocity. After a while he opens

his parachute and reaches a new (lower) terminal velocity.

Which graph shows how the air resistance (drag) force acting on him varies with time during

the fall?

drag

time

Adrag

time

B

drag

time

Cdrag

time

D

BMAT - Physics

Documents

Transcript of BMAT - Physics