2016年4月2日 星期六
F2 IS 2nd term QZ 03 (9.3) ans
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9.3
Word
Translation (8 marks)
i Write
down the English terms of the following Chinese terms:
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Chinese
term
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English
term
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1
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重力
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Force of gravity
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2
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拉
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Pull / Pulling
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3
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施加 (…於…)
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Exert (…on…)
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4
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中心
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Centre
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5
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天體
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Celestial bodies
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6
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重量
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Weight
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7
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質量
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Mass
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8
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物質
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Matter
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Multiple Choice (5 marks)
Circle
the letter of the best answer for each question.
1. Which of the
following statements is/are correct?
(1) No force of
gravity acts on an object when it rests on a desk.
(2) An
artificial satellite can move around the Earth even though it has no engine.
(3) Raindrops
fall down due to gravity.
A. (1)
only B. (3)
only C. (1)
and (2) only D. (2) and (3) only
2. Which
of the following instruments can be used to measure the force of gravity acting
on an object?
(1) Electronic balance (2) Spring balance (3) Bathroom scale
A. (1)
and (2) only B. (1) and (3)
only C. (2) and (3) only D. (1), (2) and (3)
3. Andrew’s weight is 600 N on the Earth.
Estimate his weight on the Moon.
A. 0 N B. 100
N C. 600 N D. 3600 N
4. Which of the following statements about
weight is/are correct?
(1) Weight is a kind of force.
(2) The weight of an object depends only on the
amount of matter the object contains.
(3) An object falls down because of its weight.
A. (1)
only B. (1)
and (2) only C. (1) and (3) only D. (2) and (3) only
5. Which of
the following statements is/are correct?
(1) Every object has the same mass on the Earth
and on the Moon.
(2) Every object has different weights on the
Earth and on the Moon respectively.
(3) The mass
of an object is the force of gravity acting on it.
A. (1)
only B. (3)
only C. (1) and (2) only D. (2) and (3) only
Fill in the Blanks (13 marks)
1 The Earth exerts a (1) pulling force on
every object on or around it.
This force is called (2) force of gravity. It
pulls objects towards the (3) centre of
the Earth.
2 The (4) weight of an
object on the Earth is the force of gravity exerted by the Earth on the object.
It can be different when it is measured on different (5) celestial bodies. Its
unit is (6) newton.
3 The (7) mass of an
object is the amount of matter it contains. It is (8) the same in
all places. Its unit is grams (g).
4 A 50 kg boy is weighing himself on planet X and the reading is 200N.
His mass on planet X is
(9) 50 kg and is (10) 50 kg on the Earth. The force of gravity exerted by planet X
on him is (11) 200 N. The force of gravity of planet X is (12) smaller (larger/smaller) than that of the Earth. His
weight on planet X is (13) smaller than his weight on the Earth.
(Hint:
1kg = 10N on the Earth)
Writing
Skill (3 marks)
1.
The Earth
exerts a force of gravity on every object on or around it.
The force
pulls the objects towards the centre of the Earth.
2.
The Moon
exerts a force of gravity on every object on or
around it.
The force pulls
the objects towards the centre of the
moon.
F2 IS 2nd term QZ 01 (9.1) ans
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9.1
Word
Translation (8 marks)
i Write
down the English terms of the following Chinese terms:
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Chinese
term
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English
term
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1
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力
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Force
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2
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運動
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Motion
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3
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方向
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Direction
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4
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速度
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Speed
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5
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彈簧秤
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Spring balance
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6
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牛頓
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Newton
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7
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接觸力
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Contact force
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8
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非排觸力
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Non-contact force
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Multiple Choice (4 marks)
Circle
the letter of the best answer for each question.
1. A force CANNOT change
____________________ .
A. the speed of motion of an object
B. the shape of an object
C. the
mass of an object
D. the direction of motion of an object
2. When a volleyball player hits the ball,
the applied force changes ____________________ .
A. the mass of the ball
B. the weight of the ball
C. the speed of motion of the ball
D. the
speed and the direction of motion the ball
3. Which of the following statements about
forces is/are correct?
(I) A spring
balance is used to measure forces.
(II) A force
can change the speed of a moving object.
(III) A force
can make an object move, but it cannot stop a moving object.
A. (I)
and (II) only
B. (I) and (III) only
C. (II) and (III) only
D. (I), (II) and (III)
4. Which of the following statements about a
spring balance is correct?
A. It can be used to measure a contact force,
but not a non-contact force.
B. It can be used to measure friction.
C. We
may get different readings if we measure the same force on different celestial bodies.
D. If the spring
in a spring balance is replaced, the pointer will always point at the same position when measuring the same force.
Fill in the Blanks (9 marks)
1 A (1) force
can start and (2) stop the motion of an object.
2 A force can also change the (3) speed /
direction
and the (4) direction / speed of motion of an object.
3 (5) Spring balance is an instrument which is used to measure forces. The
unit of force is (6) newton and the symbol is (7) N.
4 The
forces that act on object through direct contact are known as (8) contact force.
The forces that can act on objects without direct contact are called (9) non-contact force.
Challenging
Questions (Bonus 2
marks)
1.
Describe one
effect of forces seen when a bowling ball hits the pins.
The bowling ball starts the motion of the pins.
2.
When a
football player kicks the moving ball, the force changes speed and direction of the ball.
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