Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 667 · 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 grippy rubber sole (b) skating on ice (c) a smooth steel slide (d) oil on a squeaky hinge
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a wooden plank 3 N, a carpet 5 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
4. 4.True or false: a tyre with deep treads gives less friction. (a) True (b) False
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 11 N, ice 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
6. 6.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
7. 7.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
8. 8.🛞 How can we reduce friction in a machine? (a) add sand (b) make parts rough (c) press parts harder (d) oil the moving parts
9. 9.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) magnetic (d) cold
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 11 N, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
11. 11.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
12. 12.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
13. 13.True or false: a box pushed on carpet gives more friction. (a) False (b) True
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, sandpaper 8 N, ice 1 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
15. 15.True or false: a grippy rubber sole gives more friction. (a) False (b) True
16. 16.True or false: a tyre with deep treads gives more friction. (a) False (b) True
17. 17.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
18. 18.🛞 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 wooden plank 7 N, a carpet 8 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
19. 19.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
20. 20.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) a tyre with deep treads (d) chalk on a gym bar
21. 21.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
22. 22.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
23. 23.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, a glass sheet 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, sandpaper 11 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 10 N, sandpaper 12 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 5 N, a wooden plank 9 N, sandpaper 13 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet
28. 28.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wheel on ball bearings (c) a smooth steel slide (d) a box pushed on carpet
29. 29.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) a wheel on ball bearings (d) a tyre with deep treads
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 4 N, a glass sheet 5 N, a wooden plank 6 N. How many newtons more were needed on a carpet than on ice?
31. 31.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
32. 32.True or false: a rough doormat gives less friction. (a) True (b) False
33. 33.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
34. 34.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) skating on ice (d) sand on a slippery path
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 2 N, a glass sheet 5 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
36. 36.True or false: chalk on a gym bar gives less friction. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sand on a slippery path (b) a smooth steel slide (c) chalk on a gym bar (d) a rough doormat
38. 38.True or false: powder on a carrom board gives less friction. (a) True (b) False
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 4 N, a glass sheet 5 N, a carpet 6 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
40. 40.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction

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