Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 43 · 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.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
3. 3.True or false: a tyre with deep treads gives less friction. (a) False (b) True
4. 4.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, a glass sheet 2 N, a wooden plank 3 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
6. 6.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) warm (d) magnetic
7. 7.True or false: powder on a carrom board gives more friction. (a) False (b) True
8. 8.True or false: a grippy rubber sole gives more friction. (a) True (b) False
9. 9.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 2 N, a wooden plank 3 N, a carpet 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
11. 11.True or false: skating on ice gives less friction. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a rough doormat (d) a wet tiled floor
13. 13.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to look nice (d) to save rubber
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
15. 15.🔍 Which is the odd one out? (a) a smooth steel slide (b) a rough doormat (c) a wheel on ball bearings (d) oil on a squeaky hinge
16. 16.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) a grippy rubber sole (d) skating on ice
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
18. 18.🔍 Which is the odd one out? (a) a tyre with deep treads (b) chalk on a gym bar (c) a box pushed on carpet (d) powder on a carrom board
19. 19.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
20. 20.🛞 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 wooden plank 3 N, a carpet 5 N. How many newtons more were needed on a carpet than on ice?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 6 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) sandpaper (d) polished marble
23. 23.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 5 N, sandpaper 7 N, a glass sheet 2 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 5 N, a carpet 9 N. How many newtons more were needed on a carpet than on ice?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, sandpaper 14 N. How many newtons more were needed on sandpaper than on a glass sheet?
29. 29.🔍 Which is the odd one out? (a) a wet tiled floor (b) powder on a carrom board (c) oil on a squeaky hinge (d) chalk on a gym bar
30. 30.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a rough doormat
31. 31.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
32. 32.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
33. 33.🛞 Friction acts … (a) against the motion (b) only on ice (c) with the motion (d) only upwards
34. 34.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
35. 35.True or false: sand on a slippery path gives more friction. (a) False (b) True
36. 36.🛞 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 4 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
37. 37.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
38. 38.🛞 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 8 N, ice 2 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
39. 39.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 3 N, a carpet 5 N, sandpaper 6 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice

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