FIZIKMOZAC 2010

ESSAY QUESTIONS

Question 1(a) A ball is moving with constant

velocity collides with another ballwhich has a smaller mass. Beforecollision, the smaller ball is atstationary.

Explain the changes which occur toeach ball during the collision.

(b) For safety reason, explain why a busmust have passenger and speedlimit.

Question 2 SPM 2003 Section BDiagram 2(a) shows two identicalplasticine spherical balls before beingreleased from the same height.(b) shows the state of the plasticineballs when the hit the wood and thesponge. It was observed that theplasticine stopped more quickly when ithit the wood.

(a) (i) What does the wordmomentum mean?

(ii) Observe Figure(a) andFigure(b). Compare the shape

A ball is moving with constantvelocity collides with another ballwhich has a smaller mass. Beforecollision, the smaller ball is at

Explain the changes which occur to

safety reason, explain why a busmust have passenger and speed

Question 2 SPM 2003 Section B(a) shows two identical

plasticine spherical balls before beingreleased from the same height. Diagram(b) shows the state of the plasticine

lls when the hit the wood and thesponge. It was observed that theplasticine stopped more quickly when it

(i) What does the word

(ii) Observe Figure(a) andFigure(b). Compare the shape

of the plasticine balls, thesurface of thewood, the surface of thesponge before and when theplasticine balls hit thesurfaces.

Relate the changes in shapesof the plasticine balls and thesurfaces to deduce a relevantphysics concept.

(b) Explain the changes in energythat occur from the moment theplasticine ball is released until itreaches the position in(b).

(c) An earth-monitoring satellitefalls into the earth’s atmosphereat a high velocity and reaches ahigh temperature. This iscaused by the earth’sgravitational force and airresistance.Using the appropriate physicsconcepts, suggest and explainsuitable designs or ways toprotect the satellite and itsequipment:(i) from extreme heat,(ii) from breaking up onlanding

Question 3 (SPM 2008) Section BDiagram 3.1 shows two identical steelballs placed onto spring M and springN. Both springs are elastica horizontal surface. The springs arepushed down until the lengths of springM and spring N are the same.

[Assume spring M and spring N are ofthe same material, same coil diameterand same original length]

of the plasticine balls, thesurface of thewood, the surface of thesponge before and when theplasticine balls hit the

Relate the changes in shapesof the plasticine balls and thesurfaces to deduce a relevantphysics concept.

Explain the changes in energythat occur from the moment theplasticine ball is released until itreaches the position in Diagram

monitoring satellitefalls into the earth’s atmosphereat a high velocity and reaches ahigh temperature. This iscaused by the earth’sgravitational force and air

Using the appropriate physicsconcepts, suggest and explainsuitable designs or ways toprotect the satellite and its

from extreme heat,from breaking up on

[10 m]Question 3 (SPM 2008) Section B

.1 shows two identical steelballs placed onto spring M and springN. Both springs are elastic and fixed toa horizontal surface. The springs arepushed down until the lengths of springM and spring N are the same.

[Assume spring M and spring N are ofthe same material, same coil diameterand same original length]

FIZIKMOZAC 2010

(i) What is the meaning ofelasticity?[1 mark]

(ii) Using Diagram 3.1 andDiagram 3.2, compare thethickness of the spring wireand the maximum heightreached by the balls.Relate the thickness of thespring wire with the maximumheight of the ball to make adeduction regarding therelationship between thethickness of the spring wireand the elastic potentialenergy of the spring.

(b) The forces used to compress thesprings in Diagram 3.1(a) andDiagram 3.1(b) are F1 and Frespectively.

(i) Compare F1 and F2. Give onereason for this answer.

What is the meaning ofty?

.1 and.2, compare the

thickness of the spring wireand the maximum heightreached by the balls.Relate the thickness of the

maximumheight of the ball to make adeduction regarding therelationship between thethickness of the spring wireand the elastic potentialenergy of the spring.

[5 marks]ompress the.1(a) andand F2

. Give onereason for this answer.

[2 marks]

(ii) Using Diagram 3.1 andDiagram 3.2, state the energychanges that take place fromthe moment the spring iscompressed until the ballreaches its maximum height.

(c) Diagram 3.3 shows a pole vaulterperforming a jump.

Diagram 3.3

Using appropriate physicsconcepts, explain the use ofsuitable equipment andtechniques to improve hisperformance. Your answerinclude the following aspects:

(i) Vaulter’s attire(ii) Vaulter’s movement(iii) Pole used(iv) Safety

Using Diagram 3.1 and.2, state the energy

changes that take place fromthe moment the spring is

until the ballreaches its maximum height.

[2 marks]

.3 shows a pole vaulterperforming a jump.

Diagram 3.3

Using appropriate physicsconcepts, explain the use ofsuitable equipment andtechniques to improve hisperformance. Your answer shouldinclude the following aspects:

Vaulter’s attireVaulter’s movementPole used

[10 m]

FIZIKMOZAC 2010

Question 4 SPM 2007 Section CDiagram 11.1 shows the speed limit andthe load limit of heavy vehicles such asbuses and lorries.

Diagram 11.1

(a) What is meant by speed?

(b) Using the concepts of momentumand inertia, explain why thespeed limit and the load limitmust be imposed on heavyvehicles. [4 m]

(c) A tanker of mass 1 800 kgaccelerates from rest to a velocityof 45 km/hr in 10 s.(i) Calculate the acceleration of

the tanker

(ii) Calculate the force acting onthe tanker.

(d) Diagram 11.2 shows four tankersP, Q, R and S, with differentspecifications. You are requiredto determine the most suitabletanker to deliver oil safely. Studythe specifications of all the fourtankers from the followingaspects:

- The type of brakes- The number of tyres- The number and size of the tanks- The distance between the trailer

and the tractor.

Explain the suitability of theaspects. Justify your choice.[10 m]

SPM 2007 Section CDiagram 11.1 shows the speed limit andthe load limit of heavy vehicles such as

What is meant by speed?[1 m]

Using the concepts of momentumand inertia, explain why thespeed limit and the load limitmust be imposed on heavy

800 kgaccelerates from rest to a velocity

Calculate the acceleration of

Calculate the force acting on

[5 m]Diagram 11.2 shows four tankersP, Q, R and S, with differentspecifications. You are required

ermine the most suitabletanker to deliver oil safely. Studythe specifications of all the fourtankers from the following

The number and size of the tanksThe distance between the trailer

Explain the suitability of theaspects. Justify your choice.

FIZIKMOZAC 2010

Question 5Spiderman heard a loud sound when hejumped down on to a wooden platformwithout bending his legs as shown inDiagram 7.1.He repeated the action (at the sameheight) but bend his legs while landingand heard a soft sound while landing onthe same platform as shown in Diagram7.2.The Spiderman experienced a change ofmomentum in both situations and hetook shorter time to complete his actionwhen he landed without bending hislegs.

Loud landing sound

DIAGRAM 7.1

Soft landing sound

DIAGRAM 7.2

(i) What is meant by momentum?

(ii) Using Diagram 7.1 and 7.2,compare the change of

Spiderman heard a loud sound when hejumped down on to a wooden platformwithout bending his legs as shown in

at the samehis legs while landing

and heard a soft sound while landing onthe same platform as shown in Diagram

experienced a change ofmomentum in both situations and hetook shorter time to complete his actionwhen he landed without bending his

Loud landing sound

What is meant by momentum?[1 mark]

Using Diagram 7.1 and 7.2,compare the change of

momentums experienced bythe Spiderman. Relate the timefor change of momentum andthe force acting on theSpiderman, deduce a relevantphysics concept.

Question 6: Conceptual: SBP F4 08

Diagram 9.1 and Diagram 9.2 show twosprings M and N. Both springs are ofthe same material and same wirethickness but have differentconstant.

(i) What is meant by spring

(ii) Using Diagram 9.1 and Diagram9.2, compare the mass loaded bythe spring, the diameter of thespring and the extension of thespring.Relate the mass loaded by thespring, the diameter of the springand the extension of the springwith the spring constant.

Question 7:Understanding: SBP F4 08

What is meant by momentum?

momentums experienced bythe Spiderman. Relate the timefor change of momentum andthe force acting on theSpiderman, deduce a relevantphysics concept.

[5 marks]

Conceptual: SBP F4 08

Diagram 9.1 and Diagram 9.2 show twosprings M and N. Both springs are ofthe same material and same wirethickness but have different spring

spring constant?[1 mark]

Using Diagram 9.1 and Diagram9.2, compare the mass loaded bythe spring, the diameter of thespring and the extension of the

Relate the mass loaded by thespring, the diameter of the spring

the extension of the springwith the spring constant.

[5 marks]

Understanding: SBP F4 08

FIZIKMOZAC 2010

The springs in Diagram 9.1 and 9.2 willreturn to its original length when theload is removed. Explain how the forcesbetween molecules cause the ela

[ 4Question 8:Diagram 10.1 and Diagram 10.2 showtwo methods of transfering a heavyload of 50 kg from the ground to thelorry. The forces needed to transferthe heavy load are not the same.However, the work done for bothmethods of transfering are the same.

Diagram 10.1

Diagram 10.2

(a) What is meant by work?

(b) Using diagram 10.1 and 10.2,compare the forces needed totransfer the load, the distancetravelled by the load and thepotential energy gained by the load.

The springs in Diagram 9.1 and 9.2 willreturn to its original length when theload is removed. Explain how the forcesbetween molecules cause the elasticity.

[ 4 marks]

Diagram 10.1 and Diagram 10.2 showtwo methods of transfering a heavyload of 50 kg from the ground to thelorry. The forces needed to transferthe heavy load are not the same.

done for bothmethods of transfering are the same.

[1 mark]

Using diagram 10.1 and 10.2,compare the forces needed totransfer the load, the distancetravelled by the load and thepotential energy gained by the load.

Relate the forces needed to transferthe load and the distance travelledby the load with the woState the relationship between thepotential energy gained by the loadand the work done on transfering theload.

Question 9:Understanding: SBP Mid 08Diagram 11 shows the structure of arocket.

Using the principle of conservationmomentum, explain the workingprinciple of the rocket.

Question 10: QualitativeDiagram 9.3 shows a spring of thesuspension system in an ordinarymotorcycle.

Relate the forces needed to transferthe load and the distance travelledby the load with the work done.State the relationship between thepotential energy gained by the loadand the work done on transfering the

[ 5 marks]

Understanding: SBP Mid 08Diagram 11 shows the structure of a

Using the principle of conservation ofmomentum, explain the working

[4 marks]

Qualitative: SBP F4 08Diagram 9.3 shows a spring of thesuspension system in an ordinary

FIZIKMOZAC 2010

(i) State two functions of the sthe suspension system ?

[2(ii) Using the suitable physics

concepts, you are required to givesome suggestions on designing aracing motorcycle of 500cc. Explainyour suggestions based on thefollowing aspects ;- density of motorcycle parts- engine power- spring in suspension system- size of tyre- the designs of the spring

Question 11: Qualitative: Johor 07Diagram 9.3 shows a model of a schoolbus.

DIAGRAM 9.3Explain the modification to the bus tohelp to improve the safety of thepassengers and will be morecomfortable.Emphasise your explanation in thefollowing aspects:

(i) the shape of the bus body,(ii) safety features of the bus.

[10 marks]Question 12: Section B(a) Diagram 9.1 represents a 50 cent

coin and a leaf falling in a vacuumcontainer. The coin is heavier thanthe leaf.

the spring in

[2 marks](ii) Using the suitable physics

concepts, you are required to givesome suggestions on designing aracing motorcycle of 500cc. Explainyour suggestions based on the

density of motorcycle parts

spring in suspension system

the designs of the spring

: Johor 07Diagram 9.3 shows a model of a school

Explain the modification to the bus tohelp to improve the safety of the

Emphasise your explanation in the

(i) the shape of the bus body,(ii) safety features of the bus.

[10 marks]

Diagram 9.1 represents a 50 centcoin and a leaf falling in a vacuumcontainer. The coin is heavier than

Using Diagram 9.1 and the informationgiven about the weight of the twoobjects, compare the mass of the coinand the leaf, the time taken to fall, thepositions of the coin and the leaf andfinally, deduce the physical quantitywhich causes the object to

(b) A stone which is released from a tallbuilding falls down in the air.During the fall, the stoneexperiences an energy change.(i) What is meant by energy?

(ii) Explain the energy changes inthe stone

(c) Diagram 9.2 shows a student tryingto launch a water rocket.

Using Diagram 9.1 and the informationgiven about the weight of the twoobjects, compare the mass of the coinand the leaf, the time taken to fall, thepositions of the coin and the leaf andfinally, deduce the physical quantitywhich causes the object to fall.

[5 marks]

A stone which is released from a tallbuilding falls down in the air.During the fall, the stoneexperiences an energy change.

What is meant by energy?[1 mark]

Explain the energy changes in

[4 marks]

Diagram 9.2 shows a student tryingto launch a water rocket.

FIZIKMOZAC 2010

You are required to give somesuggestion on how to design a waterrocket for a national competition. Usingthe knowledge on forces, motion andproperties of materials, explain thesuggestion based on the followingaspects:

(i) Material used(ii) Shape of the rocket(iii) Angle of launching(iv) Volume of water in the rocket(v) Added structure for the moti

of the rocket.[10 marks]

Question 13 Section B:Diagram 9.1 shows a stationary pistolon a smooth surface. Diagram 9.2shows the pistol and bullet after thepistol has been fired by remote control.

You are required to give somesuggestion on how to design a water

national competition. Usingthe knowledge on forces, motion andproperties of materials, explain thesuggestion based on the following

Volume of water in the rocketAdded structure for the motion

[10 marks]

Diagram 9.1 shows a stationary pistolon a smooth surface. Diagram 9.2shows the pistol and bullet after thepistol has been fired by remote control.

(a) (i) What is the meaning ofmomentum.

(ii) State the total momentum ofthe pistol and bullet inDiagram 9.1. Using Diagram9.1 and Diagram 9.2, comparethe total momentum beforeand after the bullet is fired.Using Diagram 9.2, comparethe magnitude and direction ofthe momentum of the bulletand pistol. Name the physicsprinciple that can be appliedto the motion of the bullet andpistol.

(iii) Diagram 9.3 shows the structure ofa jet engine for a small jet plane.

You are required to give somesuggestions to improve the designof the jet engine so that it can beused on a larger jet plane thattravels at a higher speed. Usingthe knowledge on forces and

is the meaning of

[1 mark]

State the total momentum ofthe pistol and bullet inDiagram 9.1. Using Diagram9.1 and Diagram 9.2, comparethe total momentum beforeand after the bullet is fired.

ram 9.2, comparethe magnitude and direction ofthe momentum of the bulletand pistol. Name the physicsprinciple that can be appliedto the motion of the bullet and

[5 marks]

Diagram 9.3 shows the structure ofa jet engine for a small jet plane.

You are required to give somesuggestions to improve the designof the jet engine so that it can beused on a larger jet plane thattravels at a higher speed. Usingthe knowledge on forces and

FIZIKMOZAC 2010

motion and the properties ofmaterials, explain the suggestionsbased on the aspects labeled onDiagram 9.3.

[10 marks]

Question 14: Section BDiagram 9 shows a ball placed on thesmooth incline plane at point P. Theball is rolling down over the inclineplane caused by gravitational potentialenergy. Point Q and point R are at themiddle of the incline plane and at theground respectively.

(a) What is meant by gravitationalpotential energy?

(b) (i) Using Diagram 9, compare theheight of the ball, thegravitational potential energy ofthe ball, the velocity of the balland the kinetic energy of the ballat point P and point Q. Deducethe relationship between thekinetic energy and thegravitational potential energy ofthe rolling ball.

[5 marks]

(ii) Name the physical principleinvolved in (b)(i)

properties ofmaterials, explain the suggestionsbased on the aspects labeled on

[10 marks]

Diagram 9 shows a ball placed on thesmooth incline plane at point P. Theball is rolling down over the inclineplane caused by gravitational potentialenergy. Point Q and point R are at themiddle of the incline plane and at the

What is meant by gravitational

[1 mark]

(i) Using Diagram 9, compare the

gravitational potential energy ofthe ball, the velocity of the balland the kinetic energy of the ballat point P and point Q. Deducethe relationship between the

gravitational potential energy of

[5 marks]

Name the physical principle

[1 mark]

(c) Explain what happen to thevelocity of the ball when itreaches point R on the ground.

(d) Based on the physical principleabove, you are required to designa roller skate track. Usingappropriate physics concept,explain the design of the rollerskate track so that it can be usedto oscillate skate boardcontinuously. Your answershould inculed the followingaspects.(i) Shape of the track(ii) Slope of the track(iii)Surface of the track(iv)Safety

Question 15: Section C: Pahang 09You are a coach responsible to choosea student to join the school basket ballteam. A basic physical fitness test wascarried out and the results based oncertain characteristics are as shown intable 11.1.

A BMass / kg 70 65

Height / m 1.3 1.5

Respondingtime / s

0.01 0.20

Power (timetaken totransfer 50bricks to adistance of5 m / min

4 3

Time takento complete100 m run/ s

11.0 10.6

Explain what happen to theball when it

reaches point R on the ground.[3 marks]

Based on the physical principleabove, you are required to designa roller skate track. Usingappropriate physics concept,explain the design of the roller

te track so that it can be usedto oscillate skate boardcontinuously. Your answershould inculed the following

Shape of the trackSlope of the trackSurface of the track

[10 marks]

C: Pahang 09You are a coach responsible to choosea student to join the school basket ballteam. A basic physical fitness test wascarried out and the results based oncertain characteristics are as shown in

C D E50 60 40

1.7 1.4 1.6

0.01 0.05 0.04

2 2 1

10.5 11.2 12.4

FIZIKMOZAC 2010

(a) What is meant by power?[1 mark]

(b) Based on table 11.1, explain thesuitable characteristics of thestudent to be in the basket ballteam. Choose which student willbe in the basket ball team andexplain your choice.

[10 marks]

(c) When a 100 m runner reached thefinish line, the runner stoppedsuddenly and fell on the ground.Explain the situation using theappropriate physics concept.

[4 marks]

(d) Two students were asked to runup the stairs to the top floor of a10 m building. Data obtained forthe two students are as shown bytable 11.2

Mass /kg Time /sStudent A 55.0 12.0

Student B 60.0 14.0

Calculate power of each studentand determine which student hasthe highest power.

[5 marks]