Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 282 · 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 8 N, a carpet 12 N, sandpaper 14 N, a glass sheet 4 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
2. 2.True or false: skating on ice gives less friction. (a) True (b) False
3. 3.🛞 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 2 N, a carpet 5 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
4. 4.True or false: sand on a slippery path gives more friction. (a) False (b) True
5. 5.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
6. 6.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) sand on a slippery path (d) oil on a squeaky hinge
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a carpet 5 N, sandpaper 8 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
8. 8.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
9. 9.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) ice (d) a carpet
11. 11.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) cold (d) warm
12. 12.🛞 Friction acts … (a) only upwards (b) with the motion (c) only on ice (d) against the motion
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
16. 16.True or false: a grippy rubber sole gives less friction. (a) False (b) True
17. 17.True or false: a rough doormat gives less friction. (a) True (b) False
18. 18.True or false: a box pushed on carpet gives less friction. (a) False (b) True
19. 19.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
20. 20.True or false: powder on a carrom board gives less friction. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a tyre with deep treads (b) powder on a carrom board (c) oil on a squeaky hinge (d) a wet tiled floor
22. 22.True or false: a wet tiled floor gives more friction. (a) True (b) False
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 2 N, a wooden plank 6 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
24. 24.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
25. 25.🛞 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 4 N, sandpaper 7 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
26. 26.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
27. 27.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
28. 28.🛞 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 6 N, sandpaper 10 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
29. 29.🛞 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 8 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
30. 30.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
31. 31.🔍 Which is the odd one out? (a) sand on a slippery path (b) a smooth steel slide (c) a wheel on ball bearings (d) oil on a squeaky hinge
32. 32.True or false: oil on a squeaky hinge 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 carpet 5 N, sandpaper 9 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) ice (d) a carpet
34. 34.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 4 N, sandpaper 8 N, a glass sheet 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
36. 36.True or false: a smooth steel slide gives more friction. (a) True (b) False
37. 37.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
38. 38.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
39. 39.True or false: sand on a slippery path gives less friction. (a) True (b) False
40. 40.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction

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