Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 569 · 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 4 N, a wooden plank 5 N, a carpet 7 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) a glass sheet
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, a glass sheet 2 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
3. 3.🔍 Which is the odd one out? (a) a rough doormat (b) a tyre with deep treads (c) oil on a squeaky hinge (d) chalk on a gym bar
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 3 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 9 N, a carpet 12 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
6. 6.🛞 Friction acts … (a) only upwards (b) only on ice (c) with the motion (d) against the motion
7. 7.🛞 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 carpet 10 N, sandpaper 12 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
8. 8.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
9. 9.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
10. 10.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
11. 11.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) magnetic (d) cold
12. 12.True or false: a smooth steel slide gives more friction. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 2 N, a carpet 3 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
15. 15.True or false: a smooth steel slide 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 1 N, a glass sheet 2 N, a carpet 5 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
17. 17.True or false: a tyre with deep treads gives more friction. (a) False (b) True
18. 18.True or false: a rough doormat gives less friction. (a) False (b) True
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 11 N, a glass sheet 4 N, a wooden plank 6 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
20. 20.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
21. 21.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) a grippy rubber sole (d) sand on a slippery path
22. 22.🛞 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 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, ice 1 N, a glass sheet 5 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
24. 24.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, ice 2 N, a glass sheet 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
27. 27.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
28. 28.🛞 How can we reduce friction in a machine? (a) press parts harder (b) add sand (c) oil the moving parts (d) make parts rough
29. 29.True or false: a box pushed on carpet gives less friction. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) powder on a carrom board (d) skating on ice
31. 31.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 3 N, a glass sheet 6 N, a wooden plank 8 N. How many newtons more were needed on a carpet than on ice?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, sandpaper 5 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 10 N, ice 4 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
36. 36.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, ice 2 N, a glass sheet 3 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) ice
38. 38.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
39. 39.🔍 Which is the odd one out? (a) skating on ice (b) sand on a slippery path (c) a rough doormat (d) chalk on a gym bar
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 7 N, sandpaper 11 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank

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