Form 2 Chapter 7
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Form 2 Chapter 7 as PDF for free.
More details
- Words: 515
- Pages: 8
Form 2 Science Chapter 7
FORM 2 CHAPTER 7 DYNAMICS 1. (a) Name the forces shown in Diagram 1.1.
(i) …………………………………..
(ii) …………………………………..
(iii) …………………………………..
(iv) …………………………………..
Diagram 1.1 [4 marks] (b) Diagram 1.2 shows a girl playing hockey.
Diagram 1.2
JPN Pahang 2009
106
Form 2 Science Chapter 7
State two effects of force on the ball when the girl hits the ball with a hockey stick. (i) ……………………………………………………………………………………………………. (ii) ……………………………………………………………………………………………………. [2 marks]
JPN Pahang 2009
107
Form 2 Science Chapter 7
2. A worker pushes a sack of rice using a trolley to the shop as shown in Diagram 2.1.
Diagram 2.1 (a) If the frictional force between the trolley and the ground is 500 N, calculate the work done by the worker.
[2 marks] (b) A boy tries to push the sack of rice but the sack is too heavy for him to move. (i) Did the small boy do any work? …………………………………………………………………………………………………. [1 mark] (ii) Why? …………………………………………………………………………………………………. [1 mark]
JPN Pahang 2009
108
Form 2 Science Chapter 7
Diagram 2.2 (c) The worker carries a sack of rice weighing 50 kg upstairs. If the mass of the man is 65 kg, calculate the work done in Diagram2.2. (1 kg = 10 N)
[2 marks] (d) The worker takes 5 minutes to complete the work in (c). Calculate his power.
.
[2 marks]
JPN Pahang 2009
109
Form 2 Science Chapter 7
3. Diagram 3.1 shows a wooden block being pulled on a table top. Spring balance
Wooden block
Smooth table top
Diagram 3.1
(a) Name the forces acting on the wooden block. (i)
…………………………………………………………………………………………… ……
(ii)
…………………………………………………………………………………………… …… [2 marks]
(b) Using , draw the direction of the frictional force acting on the wooden block in the box provided in Diagram 3.1. [1 mark] (c) What will happen to the reading of the spring balance if the same wooden block is pulled along a piece of sand paper? ……………………………………………………………………………………………………… [1 mark] (d) Diagram 3.2 shows a man pushing a box towards the wall. Wall Box
5m Diagram 3.2 JPN Pahang 2009
110
Form 2 Science Chapter 7
(i) Suggest one way on how he can reduce the force needed to push the box. ………………………………………………………………………………………………….. [1 mark] (ii) If the force needed to push the box is 300 N. Calculate the work done by the man in pushing the box towards the wall.
[2 marks]
JPN Pahang 2009
111
Form 2 Science Chapter 7
4.
Diagram 4.1 shows some methods used to reduce friction.
P: ………………………..
Q: ………………………..
R: ………………………..
Diagram 4.1 (a) Name method P, Q, and R on Diagram 4.1. [3 marks] (b) Diagram 4.2 shows some used tyres.
Diagram 4.2 (i) What has happened to the surfaces of the tyres? …………………………………………………………………………………………………. [1 mark] (ii) Explain your answer in (b)(i). ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. [1 mark] JPN Pahang 2009
112
Form 2 Science Chapter 7
(c) Diagram 4.3 shows two persons walking.
Diagram 4.3 (i) State one advantage of friction in this situation. ………………………………………………………………………………………………… [1 mark] (ii) State one disadvantage of friction in this situation. ………………………………………………………………………………………………… [1 mark]
JPN Pahang 2009
113
FORM 2 CHAPTER 7 DYNAMICS 1. (a) Name the forces shown in Diagram 1.1.
(i) …………………………………..
(ii) …………………………………..
(iii) …………………………………..
(iv) …………………………………..
Diagram 1.1 [4 marks] (b) Diagram 1.2 shows a girl playing hockey.
Diagram 1.2
JPN Pahang 2009
106
Form 2 Science Chapter 7
State two effects of force on the ball when the girl hits the ball with a hockey stick. (i) ……………………………………………………………………………………………………. (ii) ……………………………………………………………………………………………………. [2 marks]
JPN Pahang 2009
107
Form 2 Science Chapter 7
2. A worker pushes a sack of rice using a trolley to the shop as shown in Diagram 2.1.
Diagram 2.1 (a) If the frictional force between the trolley and the ground is 500 N, calculate the work done by the worker.
[2 marks] (b) A boy tries to push the sack of rice but the sack is too heavy for him to move. (i) Did the small boy do any work? …………………………………………………………………………………………………. [1 mark] (ii) Why? …………………………………………………………………………………………………. [1 mark]
JPN Pahang 2009
108
Form 2 Science Chapter 7
Diagram 2.2 (c) The worker carries a sack of rice weighing 50 kg upstairs. If the mass of the man is 65 kg, calculate the work done in Diagram2.2. (1 kg = 10 N)
[2 marks] (d) The worker takes 5 minutes to complete the work in (c). Calculate his power.
.
[2 marks]
JPN Pahang 2009
109
Form 2 Science Chapter 7
3. Diagram 3.1 shows a wooden block being pulled on a table top. Spring balance
Wooden block
Smooth table top
Diagram 3.1
(a) Name the forces acting on the wooden block. (i)
…………………………………………………………………………………………… ……
(ii)
…………………………………………………………………………………………… …… [2 marks]
(b) Using , draw the direction of the frictional force acting on the wooden block in the box provided in Diagram 3.1. [1 mark] (c) What will happen to the reading of the spring balance if the same wooden block is pulled along a piece of sand paper? ……………………………………………………………………………………………………… [1 mark] (d) Diagram 3.2 shows a man pushing a box towards the wall. Wall Box
5m Diagram 3.2 JPN Pahang 2009
110
Form 2 Science Chapter 7
(i) Suggest one way on how he can reduce the force needed to push the box. ………………………………………………………………………………………………….. [1 mark] (ii) If the force needed to push the box is 300 N. Calculate the work done by the man in pushing the box towards the wall.
[2 marks]
JPN Pahang 2009
111
Form 2 Science Chapter 7
4.
Diagram 4.1 shows some methods used to reduce friction.
P: ………………………..
Q: ………………………..
R: ………………………..
Diagram 4.1 (a) Name method P, Q, and R on Diagram 4.1. [3 marks] (b) Diagram 4.2 shows some used tyres.
Diagram 4.2 (i) What has happened to the surfaces of the tyres? …………………………………………………………………………………………………. [1 mark] (ii) Explain your answer in (b)(i). ……………………………………………………………………………………………………. ……………………………………………………………………………………………………. [1 mark] JPN Pahang 2009
112
Form 2 Science Chapter 7
(c) Diagram 4.3 shows two persons walking.
Diagram 4.3 (i) State one advantage of friction in this situation. ………………………………………………………………………………………………… [1 mark] (ii) State one disadvantage of friction in this situation. ………………………………………………………………………………………………… [1 mark]
JPN Pahang 2009
113
Related Documents
Form 2 Chapter 7
May 2020 15
Form 3 Chapter 7
May 2020 14
Form 2 Chapter 2
May 2020 19
Form 2 Chapter 8
May 2020 19
Chapter Summary _ Form 2
June 2020 23