Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 222 · 40 questions

Engineer's tip (Rough grips, smooth slides): More friction: rough, dry, grippy. Less friction: smooth, oiled, wet, icy, rolling, powdered. Helpful for grip and braking; a problem when it wears or heats parts. Friction test: bigger force needed → more friction.

1. 1.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 5 N, sandpaper 7 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
2. 2.🛞 Why are tyres made with deep treads? (a) to go slower (b) to grip the road (c) to look nice (d) to save rubber
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 1 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 10 N, a carpet 14 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
5. 5.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
6. 6.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
7. 7.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 9 N, sandpaper 13 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
9. 9.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
10. 10.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
11. 11.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
12. 12.True or false: powder on a carrom board gives less friction. (a) True (b) False
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
14. 14.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
15. 15.🔍 Which is the odd one out? (a) a wet tiled floor (b) a tyre with deep treads (c) oil on a squeaky hinge (d) powder on a carrom board
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 8 N, a carpet 12 N. How many newtons more were needed on a carpet than on ice?
17. 17.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
18. 18.True or false: a rough doormat gives less friction. (a) False (b) True
19. 19.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
20. 20.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
21. 21.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
22. 22.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) a rough doormat (d) sand on a slippery path
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, a carpet 12 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
24. 24.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
25. 25.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 10 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
29. 29.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, a carpet 8 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
31. 31.🛞 Friction acts … (a) with the motion (b) only on ice (c) only upwards (d) against the motion
32. 32.True or false: a smooth steel slide gives less friction. (a) False (b) True
33. 33.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
34. 34.True or false: a wet tiled floor gives more friction. (a) True (b) False
35. 35.True or false: a rough doormat gives more friction. (a) True (b) False
36. 36.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
37. 37.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, sandpaper 8 N, ice 1 N, a glass sheet 2 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 3 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
40. 40.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem

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