Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 409 · 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 glass sheet 1 N, a wooden plank 3 N, a carpet 4 N, sandpaper 8 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
2. 2.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
3. 3.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
4. 4.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
5. 5.True or false: a smooth steel slide gives less friction. (a) True (b) False
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
7. 7.True or false: sand on a slippery path gives less friction. (a) False (b) True
8. 8.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
9. 9.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
10. 10.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) skating on ice (d) a box pushed on carpet
11. 11.True or false: chalk on a gym bar gives less friction. (a) True (b) False
12. 12.🛞 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 carpet 10 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) a smooth steel slide (d) sand on a slippery path
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
15. 15.True or false: a tyre with deep treads gives less friction. (a) False (b) True
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a wooden plank 7 N, a carpet 10 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
17. 17.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
18. 18.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
19. 19.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
20. 20.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 12 N, ice 4 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
22. 22.🛞 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, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
23. 23.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a wheel on ball bearings (d) a rough doormat
24. 24.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a grippy rubber sole (c) a box pushed on carpet (d) a tyre with deep treads
25. 25.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
26. 26.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) skating on ice (b) a wheel on ball bearings (c) chalk on a gym bar (d) a wet tiled floor
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 10 N, sandpaper 11 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
29. 29.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
30. 30.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) cold (d) magnetic
31. 31.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) sandpaper (d) polished marble
32. 32.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
33. 33.True or false: a smooth steel slide gives more friction. (a) False (b) True
34. 34.🛞 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 7 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
35. 35.True or false: a rough doormat gives more friction. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) chalk on a gym bar (d) a smooth steel slide
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 12 N, a carpet 14 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
38. 38.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
39. 39.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
40. 40.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful

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