Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 258 · 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 is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) chalk on a gym bar (d) a tyre with deep treads
2. 2.🛞 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 carpet 12 N, sandpaper 15 N. How many newtons more were needed on sandpaper than on ice?
3. 3.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) polished marble (d) sandpaper
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) a wooden plank
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 8 N. How many newtons more were needed on a carpet than on ice?
7. 7.🛞 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, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
8. 8.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
9. 9.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) warm (d) magnetic
10. 10.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
11. 11.🛞 Friction acts … (a) only upwards (b) only on ice (c) against the motion (d) with the motion
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 11 N, sandpaper 12 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
13. 13.True or false: a box pushed on carpet gives more friction. (a) True (b) False
14. 14.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
15. 15.🛞 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 wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
17. 17.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
18. 18.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
19. 19.True or false: a rough doormat gives less friction. (a) True (b) False
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a carpet 5 N, sandpaper 9 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
22. 22.🔍 Which is the odd one out? (a) a tyre with deep treads (b) skating on ice (c) chalk on a gym bar (d) a grippy rubber sole
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 2 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
24. 24.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
25. 25.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) chalk on a gym bar (c) sand on a slippery path (d) a rough doormat
26. 26.True or false: a smooth steel slide gives more friction. (a) False (b) True
27. 27.True or false: skating on ice gives less friction. (a) False (b) True
28. 28.🛞 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, sandpaper 10 N, ice 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 3 N, sandpaper 4 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
32. 32.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
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 6 N, a carpet 9 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
35. 35.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
36. 36.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
37. 37.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
38. 38.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
39. 39.True or false: a wet tiled floor gives less friction. (a) False (b) True
40. 40.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False

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