Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 456 · 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 wet tiled floor (b) a tyre with deep treads (c) a box pushed on carpet (d) chalk on a gym bar
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
3. 3.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a smooth steel slide (c) chalk on a gym bar (d) a rough doormat
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 10 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
5. 5.True or false: a tyre with deep treads gives more friction. (a) True (b) False
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 7 N, sandpaper 10 N, ice 1 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
7. 7.True or false: a grippy rubber sole gives less friction. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) a tyre with deep treads (d) a wheel on ball bearings
9. 9.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
10. 10.True or false: chalk on a gym bar gives less friction. (a) True (b) False
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 8 N, sandpaper 11 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
12. 12.🔍 Which is the odd one out? (a) a box pushed on carpet (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) skating on ice
13. 13.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
14. 14.True or false: sand on a slippery path gives more friction. (a) True (b) False
15. 15.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) polished marble (d) glass
16. 16.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
17. 17.True or false: a tyre with deep treads gives less friction. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a rough doormat
19. 19.True or false: a rough doormat gives more friction. (a) True (b) False
20. 20.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 2 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
22. 22.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) sand on a slippery path (d) a rough doormat
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, a glass sheet 1 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
24. 24.🛞 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 5 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
25. 25.True or false: a wet tiled floor gives less friction. (a) True (b) False
26. 26.True or false: skating on ice gives more friction. (a) True (b) False
27. 27.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, a carpet 14 N, ice 4 N, a glass sheet 7 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 11 N, a carpet 12 N, ice 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
30. 30.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
31. 31.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
32. 32.True or false: a smooth steel slide gives less friction. (a) False (b) True
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N, sandpaper 8 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
34. 34.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 11 N, ice 4 N, a wooden plank 8 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
37. 37.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
38. 38.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
39. 39.True or false: a grippy rubber sole gives more friction. (a) False (b) True
40. 40.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction

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