Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 574 · 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.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
2. 2.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
3. 3.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
4. 4.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
5. 5.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
6. 6.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
7. 7.🔍 Which is the odd one out? (a) powder on a carrom board (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a smooth steel slide
8. 8.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
9. 9.True or false: powder on a carrom board gives more friction. (a) False (b) True
10. 10.True or false: sand on a slippery path gives less friction. (a) True (b) False
11. 11.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
12. 12.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) magnetic (d) cold
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, sandpaper 6 N, ice 1 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on ice?
14. 14.True or false: a rough doormat gives more friction. (a) True (b) False
15. 15.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
16. 16.🔍 Which is the odd one out? (a) sand on a slippery path (b) chalk on a gym bar (c) a tyre with deep treads (d) powder on a carrom board
17. 17.True or false: a tyre with deep treads gives more friction. (a) False (b) True
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 4 N, a glass sheet 5 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
19. 19.🛞 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 6 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, a carpet 13 N, ice 3 N, a glass sheet 6 N. How many newtons more were needed on a carpet than on ice?
21. 21.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
22. 22.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
23. 23.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) a rough doormat (d) a wheel on ball bearings
24. 24.True or false: sand on a slippery path gives more friction. (a) True (b) False
25. 25.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
26. 26.True or false: chalk on a gym bar gives less friction. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) powder on a carrom board (b) chalk on a gym bar (c) a wet tiled floor (d) a smooth steel slide
28. 28.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 10 N, ice 4 N, a glass sheet 8 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
30. 30.🛞 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, a carpet 11 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
31. 31.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, a glass sheet 1 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
33. 33.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
34. 34.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a rough doormat (c) a box pushed on carpet (d) chalk on a gym bar
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: ice 4 N, a wooden plank 6 N, a carpet 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
37. 37.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a tyre with deep treads (d) skating on ice
38. 38.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
39. 39.True or false: a grippy rubber sole gives less friction. (a) False (b) True
40. 40.True or false: a tyre with deep treads gives less friction. (a) False (b) True

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