Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 59 · 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.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) powder on a carrom board (b) chalk on a gym bar (c) a box pushed on carpet (d) sand on a slippery path
3. 3.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
4. 4.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) cold (d) magnetic
5. 5.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
6. 6.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) a wheel on ball bearings (d) a grippy rubber sole
7. 7.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
8. 8.True or false: sand on a slippery path gives less friction. (a) False (b) True
9. 9.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
10. 10.🛞 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 8 N, sandpaper 12 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
11. 11.True or false: a box pushed on carpet gives less friction. (a) False (b) True
12. 12.True or false: a smooth steel slide gives more friction. (a) True (b) False
13. 13.True or false: a wet tiled floor gives more friction. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) sand on a slippery path (b) chalk on a gym bar (c) a box pushed on carpet (d) a wet tiled floor
15. 15.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
16. 16.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
17. 17.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
18. 18.True or false: skating on ice gives less friction. (a) True (b) False
19. 19.True or false: a wet tiled floor gives less friction. (a) True (b) False
20. 20.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a wooden plank 3 N, a carpet 4 N. How many newtons more were needed on sandpaper than on ice?
22. 22.True or false: a rough doormat gives less friction. (a) False (b) True
23. 23.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
24. 24.True or false: a rough doormat gives more friction. (a) True (b) False
25. 25.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 8 N, sandpaper 12 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
27. 27.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) a grippy rubber sole (d) sand on a slippery path
28. 28.True or false: a tyre with deep treads gives less friction. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a tyre with deep treads (c) a grippy rubber sole (d) a smooth steel slide
30. 30.🛞 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 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
31. 31.True or false: skating on ice gives more friction. (a) False (b) True
32. 32.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
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 2 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
34. 34.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
35. 35.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
37. 37.🛞 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 8 N, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
38. 38.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
39. 39.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) a wet tiled floor (d) sand on a slippery path
40. 40.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction

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