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JURONG JUNIOR COLLEGE JC1 Promotional Examination 2014
Name Class 15S
PHYSICS Higher 1
Multiple Choice
Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended)
8866/1
24 September 2014
1 hour
READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name and class in the spaces provided at the top of this page. Shade in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided. There are thirty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
(This question paper consists of 16 printed pages)
1 Which pair contains one vector and one scalar quantity?
A torque and kinetic energy
B displacement and acceleration
C momentum and velocity
D power and speed
2 A student takes 5 readings of the diameter of a rod: 5.6 mm, 6.3 mm, 5.9 mm, 6.6 mm, 6.2 mm. The actual diameter of the rod is 5.0 mm.
Which of the following best describe the errors in the readings?
Random error Systematic error
A low low
B low high
C high low
D high high
3 A car is travelling at a velocity of 34 m s-1 due west initially. At a later time, it is seen travelling at a velocity of 20 m s-1 due south.
Given that the direction North N, points vertically towards the top of the page, which of the following vector represents the change in velocity of the car?
4 A car is travelling at its cruising speed on an expressway. It is then brought to rest.
Which value is the best estimate of the car's change of momentum?
A 3 x 103 kg ms-1
B 3 x 104 kg ms-1
C 3 x 105 kg ms-1
D 3 x 106 kg ms-1
5 The maximum kinetic energy, KE of an electron in the photoelectric effect is given as
KE = hf - .
Which statement must be correct for the equation to be homogenous?
A KE, h, f and all have the same units
B KE, h, f and are all scalar quantities
C The product hf has the same units as KE and
D The product hf is numerically equal to (KE + )
6 An antelope is running in a straight line along the East-West direction, with the positive direction to the East. The figure below shows this animal’s velocity as a function of time.
Which of the following statements about the animal’s motion must be true?
A Its speed is increasing at a uniform rate.
B Its acceleration is increasing.
C It is moving to the East between a and c.
D It is moving to the West between a and b and to the East between b and c.
7 A cyclist is initially at rest on a downward slope which leads to a horizontal road.
The cyclist does not pedal or apply the brakes, but allows the bicycle to freewheel down the slope and along the horizontal road. The cyclist experiences a constant resistive force.
Which graph best represents the way the cyclist’s velocity v varies with time t?
8 A multiple exposure photograph is taken for a sphere dropping vertically. The time interval between each pair of successive exposures is always the same.
Taking downwards as positive, which graph best represents, the motion of the sphere during this period?
The graph shows the variation with extension x of the load F on a certain spring.
0
5
10
15
20
25
0.00 0.02 0.04 0.06 0.08 0.10
x / m
F /
N
A load of 10 N is placed on the spring.
How much additional elastic potential energy will be stored in the spring if it is then extended a further 0.040 m?
A 0.200 J B 0.450 J C 0.600 J D 0.800 J
12
A long and thin L-shaped tube is filled with liquid to the depth as shown in the figure below. The pressure at X due to the liquid alone is P. The tube is then rotated by an
angle of 45.
The pressure exerted at X due to the liquid is now
22 Two objects P and Q are originally held together at rest with a compressed light spring between them. P has a larger mass compared to Q.
Which of the following statements is correct about the motion of P and Q upon release and the light spring is allowed to extend? Assume there is no friction.
A P has less kinetic energy than Q.
B P has a smaller momentum than Q.
C P has a larger acceleration than Q.
D The magnitude of the velocities of P and Q are equal.
23 The graph below shows the force acting on a body of 2.0 kg over a period of 4.0 s.
If the body was initially moving at 1.0 m s-1, what would be its velocity after 4.0 s?
27 A fixed mass of gas undergoes changes of pressure and volume as shown in the figure below.
When the gas is taken from state R to state Q by the stages RS ad SQ, the total work done by the gas is
A zero B 1.5 J
C 9.0 J D 1.5 x 106 J
28 A box of weight 100 N is pushed 10 m up a slope inclined at 30° above the horizontal by a force of 150 N along the slope. The frictional force opposing the motion is 60 N.
How much of the work done by the 150 N force is converted into kinetic energy and thermal energy?