Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 920 · 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: a wooden plank 5 N, a carpet 9 N, sandpaper 10 N, a glass sheet 3 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a carpet 3 N, sandpaper 4 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
3. 3.🔍 Which is the odd one out? (a) a rough doormat (b) a wet tiled floor (c) a smooth steel slide (d) oil on a squeaky hinge
4. 4.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 8 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
7. 7.True or false: a rough doormat gives more friction. (a) False (b) True
8. 8.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
9. 9.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 10 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
12. 12.🔍 Which is the odd one out? (a) a smooth steel slide (b) a grippy rubber sole (c) sand on a slippery path (d) chalk on a gym bar
13. 13.True or false: powder on a carrom board gives more friction. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wheel on ball bearings (c) a wet tiled floor (d) powder on a carrom board
15. 15.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) oil on a squeaky hinge (d) a tyre with deep treads
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
17. 17.True or false: a rough doormat gives less friction. (a) True (b) False
18. 18.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
19. 19.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 8 N, sandpaper 9 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
21. 21.True or false: a tyre with deep treads gives less friction. (a) True (b) False
22. 22.True or false: sand on a slippery path gives more friction. (a) False (b) True
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 11 N, ice 3 N, a glass sheet 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
24. 24.True or false: a grippy rubber sole gives less friction. (a) False (b) True
25. 25.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
26. 26.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
27. 27.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
28. 28.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) skating on ice (d) a wet tiled floor
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
30. 30.🛞 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 8 N. How many newtons more were needed on sandpaper than on ice?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 7 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 7 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
34. 34.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 9 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 10 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
37. 37.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
38. 38.True or false: a box pushed on carpet gives less friction. (a) False (b) True
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 11 N, ice 4 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
40. 40.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction

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