Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 646 · 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: a wooden plank 5 N, a carpet 6 N, sandpaper 10 N, ice 1 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
2. 2.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
4. 4.True or false: a smooth steel slide gives more friction. (a) False (b) True
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 carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
6. 6.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 9 N, a glass sheet 2 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
8. 8.True or false: a tyre with deep treads gives more friction. (a) True (b) False
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a wooden plank 4 N, a carpet 8 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
10. 10.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
11. 11.🛞 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, sandpaper 7 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, ice 1 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
14. 14.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
15. 15.True or false: skating on ice gives more friction. (a) True (b) False
16. 16.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 3 N, sandpaper 6 N, a glass sheet 1 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 5 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 7 N, a carpet 11 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 5 N, a carpet 6 N, sandpaper 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
22. 22.True or false: a rough doormat gives less friction. (a) True (b) False
23. 23.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 6 N, a carpet 10 N, sandpaper 13 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
25. 25.True or false: sand on a slippery path gives more friction. (a) False (b) True
26. 26.True or false: a smooth steel slide gives less friction. (a) True (b) False
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 7 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
28. 28.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
29. 29.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
30. 30.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) sand on a slippery path (d) a wheel on ball bearings
31. 31.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
32. 32.🛞 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 9 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 4 N, a glass sheet 6 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
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 6 N, sandpaper 9 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 10 N, ice 3 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
36. 36.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
37. 37.True or false: chalk on a gym bar gives more friction. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 6 N, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 4 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) a carpet
40. 40.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction

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