Kowloon Tong School (Secondary Section)
F.2 Integrated Science Test: Chapter 9
Multiple Choice (10 marks)
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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C
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C
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C
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C
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A
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A
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D
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D
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C
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D
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Fill in the Blanks (10 marks)
1 Force can be measured by
a (1)spring
balance. The unit of force is (2)Newton and the symbol is (3)N.
2 A (4)streamlined shape design of a
rocket can reduce air resistance when it is launched from the Earth.
3 Forces occur in pairs,
they are action and (5)reaction .
4 A force can change the speed and the (6)direction of an moving
object.
5 (7)Friction always oppose the sliding motion of
an object. It acts along the contacting surfaces of two object.
7 (8)Water resistance opposes our motion when we
swim in water.
8 The forces that act on object through direct contact are known
as (9)contact
forces.
9 The Earth exerts a force of (10)gravity on every object on or
around it. It pulls the objects towards the centre of the Earth.
The
figure on the right shows a tennis player is hitting a tennis ball with a
racket.
(a)
List TWO
effects of the force on the motion of the tennis. (2 marks)
The force changes the speed and the direction of the tennis.
(b)
Draw the
force acting on the ball by the racket and the reaction force
in the following diagram: (2 marks)
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