8/17/2019 Trial Terengganu - Q

1/9

8/17/2019 Trial Terengganu - Q

2/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

3

6  An object moves in a circular motion on a smooth horizontal surface. If the speed of the object is

constant, which of the following statements is true about the circular motion of the object?

A  The angular velocity increases as the radius of the circular path increasesB  Work done by the centripetal force on the object increases when the centripetal force increasesC  The linear momentum of the object does not changes because the speed of the object is constant

D  The radius of the circular path decreases when the centripetal force acting on the object increases

7  The escape velocity of a body at the surface of two different planets are the same if the planets have

A the same mass C the same ratio ofmass

radius 

B the same radius  D the same ratio ofmass

radius 2 

8  The figure below shows a rod AB of length 6 m, weight 200 N, with the end A attached to the wall. A

load of 600 N is hung from its other end B. If the fulcrum is 4 m from end B, what is the normal reaction

acting on the fulcrum?

A  2100 N B  3200 N C  4300 N D  5600 N

9  When a metal wire is stretched over a limit, it undergoes plastic deformation. Which statement is true?

A Stress is proportional to strain.B The metal is not a crystalline solid.

C The atomic planes slide over each other.D The atoms are displaced a little from their equilibrium positions.

8/17/2019 Trial Terengganu - Q

3/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

4

10  A wire is stretched without exceeding the proportional limit. The following data is obtained.

Force exerted on the wire 100 N

Cross-sectional area of wire 10 – 6 m – 2 

Extension of wire 2.0 x 10 – 3

 mOriginal length of wire 2 m

Which of the following statements is not true?

A The strain produced is 1 x 10 – 3.B The stress produced is 1 x 10

8 N m

 – 2.

C The force constant is 5 x 104 N m – 1.D The energy stored in the wire is 50 J.

11  The figure below shows the relationship between the average translational kinetic energy x

 E   of a

monoatomic molecule of an ideal gas at absolute temperature T.

The value of Boltzman constant that can be deduced from the graph above is

A b

a  C 

b

a2 

B b

a

3  D 

b

a

3

2 

12  A gas cylinder is fitted with a safety valve which releases a gas when the pressure inside the cylinder

reaches  Pa6

100.2   . Given that the maximum mass of this gas that the cylinder can hold at C 0

10  is 15kg,

what would be the maximum mass at C 0

30 ?

A  5.0 kg B  14 kg C  15 g D  16 kg

 b

a

T

 X  E   

8/17/2019 Trial Terengganu - Q

4/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

5

13  In following table, choose the correct option for factors affecting the internal energy of a fix mass of

gas.

Temperature  Volume   Pressure 

A  Yes Yes Yes

B  Yes Yes No

C  Yes No NoD   No Yes No

14  Air is injected from a cylinder of compressed air into a balloon of volume V , causing its diameter todouble. What is the work done against the pressure p of the atmosphere?

A   pV   C  4 pV  B  3 pV   D  7 pV  

15  Figure shows two metals P and of the same cross sectional area and length, joined end to end.

Insulation

The ends of the metal P and Q are fixed at temperature C 0

100  and C 0

0  respectively. The two metals are

insulated. If the thermal conductivity of metal P is 4 times that of metal Q, determine the temperature at the junction of the two metal.

A  C 0

30   B C 0

40  

C C 0

60   D C 0

80  

P Q

C 0

100   C o0  

8/17/2019 Trial Terengganu - Q

5/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

6

Section B [40 marks]

 Answer all questions in this section 

16 An object of mass 4.0 kg is whirled around in a vertical circle of radius 2.0 m at a speed of 5.0−1.

(a)  Sketch a free body diagram when object at the bottom of the circle and when the object is at the topof the circle. [2 marks]

(b) Calculate the maximum and minimum tension in the string that connect the object to the centre of

the circle. [5 marks]

8/17/2019 Trial Terengganu - Q

6/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

7

17  (a) The thermal conductivity & of a material is defined by the equation,

= − 

ΔT

Δ 

State two conditions before the above equation can be used. [2 marks]

(b)  Given that the thermal conductivity of glass and copper at room temperature are 0.6 w m-l K -1

and 400 w m-l  K -1 respectively. Explain the big difference in the values of the two thermal

conductivities. [2 marks]

(c)  You are asked to set up an apparatus to determine the thermal conductivity of copper. Describe the

shape of the copper specimen you will use. [3 marks]

8/17/2019 Trial Terengganu - Q

7/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

8

Section C [30 marks]

 Answer any two  questions in this section

18 (a) Define

(i) vector quantity(ii) velocity

(iii) acceleration [3 marks] 

(b) A ball is projected from the point O at an angle of 60 o to the horizontal with a velocity of 8.0 ms-1.The highest point reach is P which is height H. The point Q is 1.5 m above the ground. Air resistance is

negligible.

(i)  Find the time taken by the ball to reach the point P, and find the value of H. [4 marks]

(ii) 

FindThe time taken to reach the point Q [3 marks]

The horizontal distance x of the point Q from O [2 marks]The magnitude and direction of the velocity of the ball at Q [3 marks]

P

Q

O

8.0 ms-1 

60o 

H

1.5 m

x

8/17/2019 Trial Terengganu - Q

8/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

9

19 (a) State Newton’s law of universal gravitation  [2 marks]

Applying Newton’s Law of universal Gravitation explain qualitatively why the force of gravity between two persons close to each other is negligible but the force of gravity of the earth on an object causes the

object to accelerate towards the earth [5 marks]

(b)  A communication satellite of mass 60.0 kg in such a way that its orbit is directly above the equator.

It has an angular velocity similar to that of the earth. As a result, the satellite is always at a point above a point on the earth. Calculate

(i)  the angular velocity of the satellite in radian per second [2 marks]

(ii)  radius of the orbit [2 marks]

(iii)  the change in the gravitational potential energy if the satellite which is initially at rest on the

surface of the earth is moved to the orbit in (b) [2 marks]

(iv)  If the satellite revolves around another planet in a circular orbit of radius 4.23108 with a period of 1.78 days, find the mass of the planet. [2 marks]

20 (a) The gas molecules in a container at a certain temperature do not have the same speed. Explain.

[3 marks]

(b) State two other assumptions for the kinetic theory of gases. [2 marks]

(c) Kinetic theory of gases predicts the relationship

 p =

1

3 

where P and p are pressure and density of the gas respectively, and is the root mean square speed for the

molecules. Use the relationship to obtain an expression for the average kinetic energy per molecule of the gas

in terms of k: and T where k is the Boltzmann constant and T is the temperature of the gas. [3 marks]

Hence, calculate the total kinetic energy for one mole of hydrogen molecules at temperature 300 K.

[2 marks]

Sketch a graph to show the distribution of molecular speeds for a gas at two different temperatures T 1 and T2 

where T2 > T1. Compare the physical characteristics of the two speed distributions by giving reasons for your

answer. [5 marks]

8/17/2019 Trial Terengganu - Q

9/9

CONFIDENTIAL*

960/1 [Turn Over]*This question paper is CONFIDENTIAL until the examination is over CONFIDENTIAL*

10

Physics 960

Constants value

speed of light in vacuum permeability of vacuum

 permittivity of vacuum

magnitude of electron charge

Planck constant

atomic mass unit constant

electron rest mass

 proton rest mass

molar gas constant

Avogadro constant

Boltzmann constant

gravitational constant

free fall acceleration

c µo 

 o 

e

h

u

me 

m p 

 R

 L, N  A 

k

G

 g  

==

=

=

=

=

=

=

=

=

=

=

=

=

3.00 x 10

8

 m s

-1

 4π x 10-7 H m-1 

8.85 x 10-12 F m-1 

[1/(36 π)] x 10-9 F m-1 

1.60 x 10-19

 C

6.63 x 10-34 J s

1.66 x 10-27 kg

9.11 x 10-31

 kg

1.67 x 10-27 kg

8.31 J K -1 mol-1 

6.02 x 1023

 mol-1

 

1.38 x 10-23 J K -1 

6.67 x 10-11 N m2 kg-2 

9.81 m s-2