Page 236 - Physics

Physics for Secondary Schools

Chapter Four 3. (a) 3

Answers to Exercise 4.1 (b) 3 000 kg/m 3
1. (a) 3.43 m 4. (a) 0.15 N
3
2. 3 g/cm 3 (b) 1.8

3. 0.48 g/cm 3 5. (a) 0.514 N
(b) 7.125 g/cm 3
Answer to Revision exercise 4

1. (i) b (iv) d Answer to Revision exercise 5
(ii) b (v) b 1. (i) b (vi) d
(iii) a (vi) a (ii) c (vii) d
(iii) c (viii) b
2. (b) 10 cm 3
(c) 30 g/cm 3 (iv) c (ix) b
(v) b (x) d
4. (b) 1.025 g/cm 3 3. 0.25 N, 9744 kg/m 3

5. 0.88 g/cm 3 4. 978.4 m 3
7. 17.7 cm 3 5. 2.48 N

8. 3.67 g/cm 3 6. 170.5 kg/m 3
11. 7.5 g/cm 3 7. (b) (i) 9.1 N
(ii) 910 cm 3

Chapter Five (iii) 910 cm 3
9. 865 kg/m 3
Answers to Exercise 5.1 10. 61.15 cm 3
2. 8 N 11. 348.84 m 3
3. 1.53 N 12. (a) Yes (b) No (c) 31.2%
4. 60 cm 3 13. 89.66 %

5. (X – Y) N
Chapter 6
Answers to Exercise 5.2 Answers to Exercise 6.1
1. 14.71 m 3 1. 0.4 m

2. (a) 10 N 2. 25 %
(b) 10 N 3. 24 N
(c) 1 kg Answer to Revision exercise 6
(d) 0.001 m 1. (i) b (iv) b
3
(e) 4 (ii) b (v) a

(f) 4000 kg/m 3 (iii) b (vi) d

230
Student’s Book Form One

Physics Form 1 Final.indd 230 16/10/2024 20:59