Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 228 · 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 surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
2. 2.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
3. 3.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
4. 4.True or false: chalk on a gym bar gives less friction. (a) False (b) True
5. 5.True or false: a wet tiled floor gives less friction. (a) False (b) True
6. 6.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
7. 7.🛞 Friction acts … (a) against the motion (b) with the motion (c) only upwards (d) only on ice
8. 8.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, ice 2 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
10. 10.True or false: a rough doormat gives more friction. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wheel on ball bearings (c) skating on ice (d) a tyre with deep treads
12. 12.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
13. 13.True or false: a rough doormat gives less friction. (a) False (b) True
14. 14.True or false: a smooth steel slide gives more friction. (a) False (b) True
15. 15.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
16. 16.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
17. 17.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
18. 18.True or false: sand on a slippery path gives less friction. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) oil on a squeaky hinge (d) a grippy rubber sole
20. 20.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
21. 21.True or false: a box pushed on carpet gives more friction. (a) True (b) False
22. 22.True or false: a grippy rubber sole gives less friction. (a) True (b) False
23. 23.🛞 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 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
24. 24.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
25. 25.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) a grippy rubber sole (d) powder on a carrom board
26. 26.True or false: a wet tiled floor gives more 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 4 N, a carpet 6 N, sandpaper 8 N, ice 1 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
28. 28.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
29. 29.🛞 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 4 N, sandpaper 6 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a glass sheet (d) sandpaper
31. 31.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a box pushed on carpet (c) chalk on a gym bar (d) sand on a slippery path
33. 33.🔍 Which is the odd one out? (a) a rough doormat (b) a tyre with deep treads (c) a box pushed on carpet (d) skating on ice
34. 34.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
35. 35.🛞 More or less friction: a wheel on ball bearings? (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 glass sheet 2 N, a wooden plank 4 N, a carpet 5 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
37. 37.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
38. 38.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 2 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
40. 40.True or false: powder on a carrom board gives less friction. (a) False (b) True

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