Form 2 Chapter 10
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Form 2 Science Chapter 10 FORM 2 CHAPTER 10 SIMPLE MACHINE 1. Diagram 1.1 shows a wheelbarrow. (a) On Diagram 1.1, label the position of the fulcrum. [1 mark] (b)(i) Based on Diagram 1.1, state the class of lever of the wheelbarrow. …………………………………………………………………………………………………. [1 mark] (ii) Give one reason for your answer in (b)(i). …………………………………………………………………………………………………. [1 mark] (c) Based on Diagram 1.2, choose one tool with the same class of lever as the wheelbarrow in Diagram 1.1. Mark ( ) in the box for the tool. JPN Pahang 2009 129 Diagram 1.1
Transcript of Form 2 Chapter 10
Form 2 ScienceChapter 10
FORM 2 CHAPTER 10 SIMPLE MACHINE
1. Diagram 1.1 shows a wheelbarrow.
(a) On Diagram 1.1, label the position of the fulcrum.[1 mark]
(b)(i) Based on Diagram 1.1, state the class of lever of the wheelbarrow.
………………………………………………………………………………………………….
[1 mark]
(ii) Give one reason for your answer in (b)(i).
………………………………………………………………………………………………….
[1 mark]
(c) Based on Diagram 1.2, choose one tool with the same class of lever as the wheelbarrow in Diagram 1.1.
Mark ( ) in the box for the tool.
[1 mark]
(d) Diagram 1.3 shows the situation when a force and a load are balanced.
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Diagram 1.1
Diagram1.2
Form 2 ScienceChapter 10
(i) Calculate force P needed to balance the metre rule.
Use the following fomula:
[3 marks]
(ii) What happens to the value of P if the load is moved nearer to the fulcrum?
………………………………………………………………………………………………….
[1 mark]
2. Diagram 2.1 shows a claw hammer.
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Diagram 1.3
Load x Distance of load form fulcrum = Force x Distance of force form the fulcrum
Form 2 ScienceChapter 10
(a) Label P, Q and R on Diagram 2.1 using the following words.
Fulcrum Load Effort
[3 marks]
(b) (i) What is the class of this lever system?
……………………………………………………………………………………………………
[1 mark]
(ii) State one reason for your answer in (b)(i).
……………………………………………………………………………………………………
[1 mark]
(c) Calculate the moment of force in Diagram 2.2 if a force of 50 N is exerted to pull the nail.
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Diagram 2.1
Q: ……………………….
R: ………………………
P: ………………………
Form 2 ScienceChapter 10
[2 marks]
3. Diagram 3 shows levers P, Q, R and S.
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Diagram 2.2
Moment of force (Nm) = Force (N) X Perpendicular distance (m)
Form 2 ScienceChapter 10
(a) Based on the observations in Diagram 3, state the class of lever P, Q, R and S.
P: ……………………………………………………………………………………………………
Q …………………………………………………………………………………………………….
R …………………………………………………………………………………………………….
S …………………………………………………………………………………………………….
[4 marks]
(b) Classify levers P, Q, R and S into two groups based on common properties.
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P Q
R S
Diagram 3
Form 2 ScienceChapter 10
Give examples of levers belonging to each group.
[4 marks]
4. Diagram 4 shows spanners P and Q which are used to tighten the nut at different time.
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P, Q, R and S
Common property
Alphabets representing the levers
Form 2 ScienceChapter 10
(a) (i) Which spanner will produce a greater turning effect?
…………………………………………………………………………………………………
[1 mark]
(ii) Explain your answer in (a)(i). ………………………………………………………………………………………………….
………………………………………………………………………………………………….
[1 mark]
(b) What are the factors that affect the moment of force?
(i) …………………………………………………………………………………………………
(ii) …………………………………………………………………………………………………
[2 marks]
(c) Calculate the moment of force on spanner P if a force of 20 N is used.
[2 marks]
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ForceForce
0.1 m 0.2 m
Spanner P Spanner Q
Diagram 4
Form 2 ScienceChapter 10
5. Diagram 5.1 shows Kok Meng and Ranjit on a see-saw. Kok Meng is 50 kg. He sits 120 cm from the fulcrum of the see-saw. The see-saw is in balanced when Ranjit who is 60 kg sits on the other end of the see-saw.
(a) (i) Name the class of lever shown in the Diagram 5.
……………………………………………………………………………………………………….
[1 mark]
(ii) Find the distance of Ranjit from the fulcrum.
[2 marks]
(iii) If Ranjit and another friend sit at the same end, what should Kok Meng do to balance the see-saw?
……………………………………………………………………………………………………
[1 mark]
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Diagram 5.2
Form 2 ScienceChapter 10
(b) Diagram 5.2 shows a pair of ice tongs.
(i) What class of lever is the ice tong?
…………………………………………………………………………………………………..
[1 mark]
(ii) At which point, A, B, C or D is the biggest effort needed to hold the ice cube? Why?
…………………………………………………………………………………………………..
…………………………………………………………………………………………………...
[2 marks]
(iii) What is the relationship between the effort and the effort arm?
……………………………………………………………………………………………….
………………………………………………………………………………………………
[1 mark]
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Ice cube
