Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 411 · 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: ice 1 N, a glass sheet 3 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
2. 2.True or false: sand on a slippery path gives more friction. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) a tyre with deep treads (d) a box pushed on carpet
4. 4.🔍 Which is the odd one out? (a) powder on a carrom board (b) a box pushed on carpet (c) a wet tiled floor (d) skating on ice
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 7 N, sandpaper 9 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
6. 6.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to grip the road (d) to look nice
7. 7.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
8. 8.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 8 N, sandpaper 9 N, a glass sheet 1 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
10. 10.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a grippy rubber sole (c) a rough doormat (d) sand on a slippery path
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 10 N, ice 3 N, a glass sheet 6 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
13. 13.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a wooden plank 6 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 7 N, sandpaper 10 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
16. 16.🛞 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 5 N, sandpaper 6 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
17. 17.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) glass (d) sandpaper
18. 18.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
19. 19.True or false: a wet tiled floor gives less friction. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) powder on a carrom board (b) a grippy rubber sole (c) oil on a squeaky hinge (d) a wheel on ball bearings
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 11 N, ice 4 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
22. 22.True or false: a smooth steel slide gives more friction. (a) True (b) False
23. 23.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
24. 24.🛞 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 5 N, sandpaper 8 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
25. 25.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
26. 26.True or false: a grippy rubber sole gives more friction. (a) False (b) True
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 11 N, ice 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) sandpaper
29. 29.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 2 N, a glass sheet 6 N, a wooden plank 8 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, a glass sheet 1 N, a wooden plank 3 N. How many newtons more were needed on sandpaper than on a glass sheet?
32. 32.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
33. 33.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
34. 34.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) a box pushed on carpet (d) a wet tiled floor
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 10 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
36. 36.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
37. 37.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a rough doormat (c) a smooth steel slide (d) sand on a slippery path
38. 38.🔍 Which is the odd one out? (a) skating on ice (b) chalk on a gym bar (c) a box pushed on carpet (d) a grippy rubber sole
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, sandpaper 12 N, ice 3 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a wooden plank (d) a glass sheet
40. 40.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction

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