Uploaded July 2015 | Updated September 2026, 3 weeks ago

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Answers:

1. Ampere (A)
2. Force (because F = ma)
3. Vernier calipers
4. µ
5. 4500 m
6. 2 ms^-2
7. 4 N, to the right
8. Yes, because his direction changes.
9. No, because his direction and speed are constant.
10. Constant
11. 6 N
12. P = F/A
13. 1000 Pa
14. 2P
15. Turning effect = 20 * 0.8 = 16 Nm anticlockwise
16. No
17. Resultant moment = 50(0.2) - 16 = -6 Nm. Hence it turns anticlockwise.
18. Height of centre of gravity and base area
19. C
20. D
21. Crest
22. 4 cm
23. 10 s
24. 0.1 Hz
25. Speed = 20 * 0.4 = 8 m/s