Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 226 · 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 wheel on ball bearings (b) oil on a squeaky hinge (c) a grippy rubber sole (d) a smooth steel slide
2. 2.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) sand on a slippery path (d) skating on ice
3. 3.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
4. 4.🛞 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 7 N, a wooden plank 8 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a carpet (d) a wooden plank
5. 5.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
6. 6.True or false: a wet tiled floor gives more friction. (a) False (b) True
7. 7.🛞 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 9 N, sandpaper 12 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) ice (d) a glass sheet
8. 8.🛞 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 13 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
9. 9.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
10. 10.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a glass sheet 7 N, a wooden plank 10 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
12. 12.True or false: a tyre with deep treads gives less friction. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 2 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
15. 15.True or false: a rough doormat gives more friction. (a) True (b) False
16. 16.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a carpet 4 N, sandpaper 5 N, ice 2 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) ice
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 7 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
19. 19.True or false: a wet tiled floor gives less friction. (a) False (b) True
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 2 N, a glass sheet 3 N, a carpet 6 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
21. 21.True or false: a grippy rubber sole gives less friction. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) sand on a slippery path (d) powder on a carrom board
23. 23.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a smooth steel slide (c) a rough doormat (d) skating on ice
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, a carpet 11 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
26. 26.🔍 Which is the odd one out? (a) a wet tiled floor (b) sand on a slippery path (c) a grippy rubber sole (d) chalk on a gym bar
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 12 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
28. 28.🛞 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, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
29. 29.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
30. 30.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
31. 31.🛞 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 8 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
32. 32.🛞 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 8 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
33. 33.True or false: a rough doormat gives less friction. (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 4 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) sandpaper
35. 35.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
36. 36.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a box pushed on carpet (d) powder on a carrom board
37. 37.True or false: chalk on a gym bar gives less friction. (a) False (b) True
38. 38.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
39. 39.🔍 Which is the odd one out? (a) powder on a carrom board (b) chalk on a gym bar (c) a grippy rubber sole (d) sand on a slippery path
40. 40.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction

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