Page 49 - Focus TG4 KSSM (Physics) Terbitan Penerbitan Pelangi Sdn Bhd

Physics Form 4 Chapter 2 Force and Motion I
Section B

4. (a) A boy plays with two punching bags, A and B, of different masses. The mass of punching bag A is 5 kg
and of punching bag B is 30 kg. Figure 4.1 and 4.2 illustrate the situation of both punching bags, A and B.

A Chapter

B
2

Figure 4.1 Figure 4.2
(i) What is meant by mass? [1 mark]
(ii) The boy needs to use force either to move or to stop the punching bags. He finds that it is more
difficult to move and to stop punching bag B compared with punching bag A. Relating the mass of
HOTS
the punching bags and the resistance to the state of motion of the bags, deduce a relevant physics
concept. [5 marks]
(iii) Name the physics concept. [1 mark]
(b) Explain how a bit of tomato sauce left inside a bottle can be forced out of the bottle. [3 marks]
(c) Figure 4.3 shows a car speeding on a road and Figure 4.4 shows the car crashing on a boulder. Due to
HOTS the lack of safety features, the driver sustained serious injuries.

Figure 4.3 Figure 4.4

The following are relevant facts concerning the car.
(i) The car stopped too suddenly upon hitting the boulder.
(ii) The driver was thrown out of the car, breaking the windscreen.
(iii) Sharp pieces of glass from the shattered windscreen cut the head of the driver.
(iv) The accident occurred at night. The driver did not see the boulder until it was very near.
Based on the above facts, suggest various features to be added to the car to improve its safety
HOTS
standard and explain how each feature can reduce injury to the driver.
[10 marks]

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