Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 406 · 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 tyre with deep treads (b) skating on ice (c) a wet tiled floor (d) oil on a squeaky hinge
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 8 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
3. 3.True or false: a smooth steel slide gives less friction. (a) True (b) False
4. 4.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
5. 5.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
6. 6.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
7. 7.🛞 Friction acts … (a) only on ice (b) with the motion (c) only upwards (d) against the motion
8. 8.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) a tyre with deep treads (d) a smooth steel slide
9. 9.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
10. 10.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) sand on a slippery path (d) a wheel on ball bearings
11. 11.True or false: a rough doormat gives less friction. (a) True (b) False
12. 12.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
13. 13.True or false: a tyre with deep treads gives less friction. (a) True (b) False
14. 14.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
15. 15.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) wet (d) magnetic
16. 16.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
17. 17.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
18. 18.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) oil on a squeaky hinge (c) chalk on a gym bar (d) skating on ice
19. 19.True or false: a smooth steel slide gives more friction. (a) False (b) True
20. 20.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
21. 21.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
22. 22.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) powder on a carrom board (c) a grippy rubber sole (d) oil on a squeaky hinge
23. 23.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, sandpaper 10 N, ice 3 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 7 N, a wooden plank 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
26. 26.🔍 Which is the odd one out? (a) powder on a carrom board (b) a rough doormat (c) a wet tiled floor (d) a smooth steel slide
27. 27.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) sand on a slippery path (d) powder on a carrom board
28. 28.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
29. 29.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
30. 30.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
31. 31.🛞 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 7 N, a carpet 11 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 3 N, sandpaper 5 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
34. 34.🛞 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, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 11 N, a carpet 14 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
36. 36.True or false: chalk on a gym bar gives less friction. (a) False (b) True
37. 37.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
38. 38.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
39. 39.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
40. 40.🛞 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) ice (c) a carpet (d) sandpaper

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