Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 963 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a wooden plank 3 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
2. 2.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 8 N, sandpaper 10 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
4. 4.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
5. 5.True or false: a smooth steel slide 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 7 N, sandpaper 11 N, ice 1 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
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 7 N, sandpaper 8 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
8. 8.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wet tiled floor (c) a rough doormat (d) a wheel on ball bearings
9. 9.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 11 N, a carpet 15 N, ice 4 N, a glass sheet 8 N. How many newtons more were needed on a carpet than on ice?
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 8 N, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
12. 12.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
13. 13.True or false: a grippy rubber sole gives more friction. (a) True (b) False
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 3 N, a wooden plank 6 N, a carpet 7 N. How many newtons more were needed on sandpaper than on ice?
15. 15.🔍 Which is the odd one out? (a) a rough doormat (b) a wet tiled floor (c) a box pushed on carpet (d) a tyre with deep treads
16. 16.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
17. 17.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
18. 18.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) skating on ice (d) a tyre with deep treads
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 5 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on ice?
20. 20.True or false: a tyre with deep treads gives more friction. (a) False (b) True
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
22. 22.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, ice 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
24. 24.🛞 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 7 N, sandpaper 11 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
25. 25.True or false: a box pushed on carpet gives more friction. (a) True (b) False
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 4 N, a carpet 5 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
27. 27.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, ice 1 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
29. 29.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
30. 30.True or false: a wet tiled floor gives more friction. (a) False (b) True
31. 31.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
32. 32.🛞 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 6 N, sandpaper 10 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
33. 33.True or false: sand on a slippery path gives more friction. (a) False (b) True
34. 34.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
35. 35.🛞 How can we reduce friction in a machine? (a) add sand (b) make parts rough (c) press parts harder (d) oil the moving parts
36. 36.True or false: a wet tiled floor gives less friction. (a) True (b) False
37. 37.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
38. 38.🛞 Friction acts … (a) only on ice (b) with the motion (c) only upwards (d) against the motion
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 3 N, a glass sheet 5 N, a wooden plank 8 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?

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