48 M

2h30m 80

/GIII :........................................................ Code: 5054 Class: GBIII

Test (Unit 1-6)

:................................................................................................................

heory Section:T [Total arks]

Time Allowed: Maximum Marks:

Date

Name Paper: Physics

1

Th

is d

ocu

men

t co

nsi

sts

of

4 p

rin

ted

pag

es.

Adabistan-e-Soophia

1 A toy car is given a brief initial push which sends it along a horizontal section of runway.The force of gravity then accelerates the car down the ramp which is shown in Fig. 1.1. In this question the only force due to friction that acts on the car is air resistance.

Fig. 1.1

(a) On Fig. 1.1, where the car is moving down the ramp at A, draw labelled arrows to show

(i) the direction of the force due to gravity on the car,

(ii) the direction of the force due to friction on the car.[1]

(b) State the effect that friction has on the motion of the car

(i) while the car is moving along the horizontal section,

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

(ii) while the car is accelerating down the ramp.

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................[2]

0.90 mhorizontal section

A

ramp

[Turn over

Fig.2.1

Fig.2.1 shows a car moving along a horizontal road.2

(c) The length of the ramp is 0.90 m and the average force of friction is 0.11 N.

(i) Calculate the work done by the car against friction as it moves down the ramp.

work done = ......................................

(ii) The car has 0.30 J of kinetic energy at the top of the ramp and loses 0.50 J ofpotential energy as it moves from the top to the bottom of the ramp.

Calculate the kinetic energy of the car at the bottom of the ramp.

kinetic energy = ......................................[4]

2

[Turn over

The car has mass 800 kg. At one point in its motion, when the combined forces of airresistance and friction acting backwards are 400 N, its acceleration is 1.4 m/s2.

(a) Calculate the forward driving force required to accelerate the car.

forward driving force = ....................................... [3]

(b) With the engine working at constant full power, the car’s acceleration decreases as itgoes faster.

Explain why this is so.

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

.................................................................................................................................... [2]

friction

airresistance

forwarddriving force

Show, using data from Fig.3.1, that the acceleration of free fall is 10 m/s

Fig.3.1

Fig.3.1 shows the variation with time 3 t of the speed of a stone that is thrown verticallydownwards. In this question, air resistance may be ignored.

The stone has mass 0.23 kg and leaves the thrower’s hand at t = 0. It hits the ground at t = 0.325 s and rebounds with 50% of the speed with which it hit the ground.

(a) State the maximum speed of the stone.

maximum speed = ..................................... [1]

(b) 2.

[2]

00

1

2

3

4

5

6

0.05 0.10 0.15 0.20 0.25 0.30 0.35

t/s

speedm/s

3

(c) Determine the speed of the stone just after it rebounds.

speed = ..................................... [1]

(d) Calculate the loss of kinetic energy of the stone as it hits the ground and rebounds.

loss of kinetic energy = ...................................... [3]

[Turn over

Fig.4.1 shows how the speed of the parachutist varies with time.

Fig.4.1

4

4

A parachutist jumps from an aircraft and falls through the air. After some time, the parachuteopens.

(a) Describe the motion of the parachutist between A and D.

..........................................................................................................................................

..........................................................................................................................................

..........................................................................................................................................

..................................................................................................................................... [3]

(b) State the value of the terminal velocity before and after the parachute opens.

before parachute opens, terminal velocity = ……………………………

after parachute opens, terminal velocity = …………………………… [1]

(c) Calculate the average value of the acceleration between B and C.

average acceleration = ………………………… [2]

00 2 4 6 8 10 12 14 16 18

10

20

30

40

50speed

m/s

time / s

A

B

C

D

[Turn over

By making a scale drawing on Fig.5.2, or otherwise, find the resultant of these two

other. Fig.5.2 shows the direction of the two tension forces acting on the object.

Fig.5.1 Fig. 5.2

Fig.5.1 shows a catapult used to project an object. Force 5 F pulls back the object, creatingtension in the rubber cords.

(a) The tension force in each rubber cord is 20 N and the two cords are at 60° to each

tension forces acting on the object. If you draw a scale drawing, state the scale that youuse.

resultant force = ………………………… [3]

(b) When the object is pulled back, the average value of the force F is 16 N and the objectmoves a distance 0.20 m in the direction of F. Calculate the work done. State clearly theequation that you use.

work done = ………………………… [2]

object

rubber cord

rubbercord

Fdirection

oftensionforce

directionof

tensionforce60°

[Turn over

5

Fig.6.1

Fig.6.1 shows the path of a ball thrown into the air.6

6

(a) (i) State at which point A, B, C or D the ball travels the slowest. …………………

(ii) Explain your choice in (i). You should write about the kinetic energy and thepotential energy of the ball.

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

............................................................................................................................. [3]

(b) The mass of the ball is 0.20 kg. At point A, the ball has kinetic energy 2.5 J. Taking the gravitational force on a mass of 1.0 kg to be 10 N, calculate

(i) the weight of the ball,

weight = …………………………

(ii) the speed of the ball at point A.

speed = …………………………[4]

A

B

C

D

[Turn over

State and explain how the graph drawn in Fig.7.2 is different when the experiment is

Fig.7.1 Fig.7.2

The results are shown in Fig.7.2.Fig.7.1 shows a spring. Masses are added to the spring and the extension is measured.7

7

(a) Explain how the extension of the spring is determined with the rule.

..........................................................................................................................................

..........................................................................................................................................

.................................................................................................................................... [1]

(b) (i) State the mass that stretches the spring to the limit of proportionality.

mass = ................................. kg

(ii) Calculate the weight of this mass.

Take the gravitational force on a mass of 1 kg to be 10 N.

weight = ................................ N[2]

(c)performed at a place where the gravitational field is weaker.

..........................................................................................................................................

..........................................................................................................................................

.................................................................................................................................... [2]

14

12

10

8

6

4

2

00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

mass / kg

extension ofspring / cm

rule

masses

spring

Fig.8.1

Fig.8.1 shows how the speed of a cyclist varies during a journey.8

(a) Describe the motion of the cyclist between points B and C.

..........................................................................................................................................

.................................................................................................................................... [2]

(b) State which parts of the graph show the cyclist moving with constant speed.

.................................................................................................................................... [1]

(c) Calculate the distance travelled by the cyclist in the first 250 s of the journey.

distance = ........................... [3]

5004003002001000 550450350250150500

2

4

6

8

1

3

5

7

time / s

speedm/s

G

FE

DC

BA

8

[Turn over

Fig. 9.1

the other end of the wire, as shown in Fig. 9.1.

9

[Total 15 Marks]

9

ATP Section:

[Turn over

A teacher and a group of students investigate the behaviour of a copper wire when stretched by heavy loads.

A long thin copper wire is clamped at one end and passes over a pulley. A 1.0 N load is attached to

bench

l

clampwoodenblocks

papermarker

metre rule pulley

load

wire

(not to scale)

(a) (i) Explain why one end of the wire has to be clamped tightly.

...........................................................................................................................................

...................................................................................................................................... [1]

(ii) Explain why the students watching the experiment must wear safety glasses.

...........................................................................................................................................

...................................................................................................................................... [1]

(b) A paper marker is attached to the wire. The length l of the wire from the wooden blocks to the marker is measured.

The marker and metre rule are used to measure the extension of the wire as the load is increased.

(i) State what is meant by extension.

...........................................................................................................................................

...................................................................................................................................... [1]

(ii) Explain why the marker is attached a long distance from the clamped end of the wire.

...........................................................................................................................................

...................................................................................................................................... [1]

(iii) Explain why some distance is left between the marker and the pulley.

...........................................................................................................................................

...................................................................................................................................... [1]

Fig. 9.3

increased, as shown in Fig. 9.3.

Use Fig. 9.2 to find the position of the marker.

Fig. 9.2

Fig. 9.2 shows a magnified view of the wire, marker and rule.

10

(c)

47cm 48 49 50 51 52bench

metre rule

wire marker

The left-hand side of the marker is used as the reference point.

(i)

position = .......................................................... [1]

(ii) Suggest why a small 1.0 N load is added before the initial reading of the position of the marker is found.

...........................................................................................................................................

...................................................................................................................................... [1]

(iii) Explain why it is difficult for a student to read the position of the marker accurately.

...........................................................................................................................................

...................................................................................................................................... [1]

(iv) Describe one change to the apparatus to make it easier to read the position of the marker accurately.

...........................................................................................................................................

...................................................................................................................................... [1]

(d) One of the students takes a series of readings of the extension e of the wire as the load F is

F / N e / mm

1.0 0

6.0 7

11.0 13

16.0 21

21.0 26

26.0 33

[Turn over

Fig. 9.4

On Fig. 9.4, plot the graph of

11

[Turn over

(i) e /mm on the y-axis against F /N on the x-axis. Start your axes from the origin. Draw the line of best fit.

00

[4]

(ii) Describe the relationship between F and e that is shown by your graph.

...........................................................................................................................................

...................................................................................................................................... [1]

(e) The teacher continues to increase the load. Describe what happens as the load becomes very large.

...................................................................................................................................................

.............................................................................................................................................. [1]

12

[Total 17 Marks]MCQ Section:

[Turn over

1 The diagram shows part of a micrometer screw gauge.

What is the reading shown?

A 5.31 mm B 5.79 mm C 5.81 mm D 6.31 mm

2 Which property of a body is affected by a change in gravitational field?

A mass

B temperature

C volume

D weight

3 Books are placed in four bookcases as shown.

Which bookcase is most likely to fall forward if pulled a little?

4 A stone of mass of 12 g and having a density of 3 g/cm3 is carefully lowered into 25 cm3 of water ina measuring cylinder.

What is the new reading on the measuring cylinder?

A 21 cm3 B 28 cm3 C 29 cm3 D 37 cm3

A B C D

0 1 2

30

3 4 5

mm

8

7

6

5

13

[Turn over

A steel ball is released just below the surface of thick oil in a cylinder.

During the first few centimetres of travel, what is the acceleration of the ball?

A constant and equal to 10m/ s2

B constant but less than 10m/ s2

C decreasing

D increasing

A hard stone hits the ground and comes to rest almost immediately.

As the stone hits the ground, what is the direction and the size of the force acting on the ground?

A downwards and equal to the weight of the stone

B downwards and larger than the weight of the stone

C upwards and equal to the weight of the stone

D upwards and larger than the weight of the stone

A car of mass 1500 kg is towing a trailer of mass 1100 kg along a level road. The acceleration of the car is 1.30m/ s2.

Ignoring friction and air resistance, what is the driving force on the car?

A 1430N B 1950N C 2000N D 3380N

A beam pivoted at one end has a force of 5.0 N acting vertically upwards on it as shown. The beam is in equilibrium.

pivot

2.0 cm 3.0 cm

5.0 N

weightof beam

What is the weight of the beam?

A 2.0N B 3.0 N C 3.3 N D 5.0 N

14

11

10

9 A manufacturer measures accurately the dimensions of a wooden floor tile.

The approximate dimensions of the tile are shown.

width 0.08 m

length 0.4 m thickness 0.005 m

Which instruments are used to measure accurately each of these dimensions?

length thickness width

A metre rule micrometer vernier calipers

B metre rule vernier calipers micrometer

C micrometer metre rule vernier calipers

D vernier calipers micrometer metre rule

Which pair of quantities includes one scalar and one vector?

A mass time

B temperature time

C temperature velocity

D velocity weight

The speed-time graph represents the journey of a car.

The dots separate different sections of the journey. There are six different sections.

speed

time0

0

How many sections represent the car moving with non-uniform acceleration?

A 0 B 1 C 2 D 3

[Turn over

15

14

13

12 Four objects of equal mass rest on a table. The centre of mass of each object is labelled G.

Which object is the least stable?

A B C D

G

G

GG

A 100g mass is suspended from a spring next to a vertical metre rule. The top of the spring is level with the 0.0cm mark. The bottom of the spring is level with the 27.2cm mark.

rule

spring

100 g

0.0

27.2 cm

The 100g mass is replaced with a 600g mass. The length of the spring is now 89.7cm. The spring has not reached the limit of proportionality.

The 600g mass is replaced with a 200g mass. What is the length of the spring?

A 29.9cm B 33.4cm C 39.7cm D 54.4cm

A block of metal is taken from the Earth to the Moon. Which property of the block changes?

A density

B mass

C volume

D weight

[Turn over

800

17

16

15 A uniform beam of weight 50N is 3.0m long and is supported on a pivot situated 1.0m from one end. When a load of weight W is hung from that end, the beam is in equilibrium, as shown in the diagram.

pivot

1.0 m

3.0 m

W

What is the value of W?

A 25N B 50N C 75N D 100N

What is the expression used to define power?

Ainputenergy

outputenergy

B energy x time taken

C force x velocity

Dtakentime

donework

A barrel of mass 50kg is loaded onto the back of a lorry 1.6m high by pushing it up a smooth plank 3.4m long.

1.6 mplank

3.4 m

barrelmass = 50 kg

lorry

What is the minimum work done?

A 80J B 170J C J D 1700J

16

[Turn over

17

Candidate Name:

Example

For question 1,

If you think B is the right answer, fill in

your answer sheet like this:

1 A B C D

Instructions

Shade

One

letter

only

for

each

question

Make

sure

you

put

your

answer

in

line

with

the

correct

question

number

17 A B C D

16 A B C D

15 A B C D

14 A B C D

13 A B C D

12 A B C D

11 A B C D 1 A B C D

2 A B C D

3 A B C D

4 A B C D

5 A B C D

6 A B C D

7 A B C D

8 A B C D

9 A B C D

10 A B C D