Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 345 · 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.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) sandpaper (d) polished marble
2. 2.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
3. 3.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
4. 4.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
5. 5.True or false: chalk on a gym bar gives less friction. (a) False (b) True
6. 6.🛞 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, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
7. 7.True or false: a wet tiled floor gives more friction. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) sand on a slippery path (b) oil on a squeaky hinge (c) a smooth steel slide (d) a wheel on ball bearings
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 6 N, a carpet 8 N, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 2 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
11. 11.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
12. 12.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 8 N, ice 3 N, a glass sheet 6 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
14. 14.True or false: sand on a slippery path gives less friction. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) a tyre with deep treads (b) skating on ice (c) a box pushed on carpet (d) a rough doormat
16. 16.True or false: a rough doormat gives less friction. (a) True (b) False
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 12 N, sandpaper 13 N, ice 4 N, a glass sheet 8 N. How many newtons more were needed on sandpaper than on ice?
18. 18.🛞 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 14 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
19. 19.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a glass sheet 3 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a carpet 9 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 4 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
23. 23.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) powder on a carrom board (d) a tyre with deep treads
24. 24.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
25. 25.🛞 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 carpet 6 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
26. 26.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
27. 27.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) warm (d) wet
28. 28.True or false: chalk on a gym bar gives more friction. (a) False (b) True
29. 29.True or false: powder on a carrom board gives more friction. (a) False (b) True
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
31. 31.🛞 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, ice 3 N. Which surface gave the most friction? (a) ice (b) sandpaper (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 glass sheet 5 N, a wooden plank 6 N, sandpaper 9 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a wooden plank 8 N, sandpaper 11 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 9 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
35. 35.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
36. 36.True or false: a box pushed on carpet gives less friction. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wet tiled floor (c) chalk on a gym bar (d) a tyre with deep treads
38. 38.True or false: a smooth steel slide gives more friction. (a) True (b) False
39. 39.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 8 N, sandpaper 9 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper

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