Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 855 · 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 is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a wheel on ball bearings
2. 2.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
3. 3.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) chalk on a gym bar (d) sand on a slippery path
4. 4.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
5. 5.🛞 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 4 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on ice?
6. 6.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
7. 7.True or false: sand on a slippery path gives more friction. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) skating on ice (d) a box pushed on carpet
9. 9.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) cold (d) wet
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 7 N, sandpaper 11 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
11. 11.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
12. 12.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
13. 13.True or false: chalk on a gym bar gives more friction. (a) False (b) True
14. 14.🛞 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, a carpet 10 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
15. 15.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 4 N, sandpaper 6 N, a glass sheet 1 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
18. 18.🛞 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 wooden plank 10 N, a carpet 13 N. How many newtons more were needed on a carpet than on ice?
19. 19.🛞 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 6 N, a carpet 9 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 wheel on ball bearings? (a) more friction (b) less friction
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a glass sheet 8 N, a wooden plank 10 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) ice (d) a glass sheet
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 9 N, ice 3 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: sandpaper 8 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
24. 24.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a wet tiled floor (c) sand on a slippery path (d) skating on ice
25. 25.True or false: skating on ice gives more friction. (a) False (b) True
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 5 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
27. 27.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
28. 28.True or false: skating on ice gives less friction. (a) False (b) True
29. 29.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
30. 30.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
31. 31.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a glass sheet 4 N, a carpet 7 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
33. 33.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 10 N, sandpaper 13 N, ice 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
35. 35.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) a rough doormat (d) a wet tiled floor
36. 36.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 5 N, sandpaper 7 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
38. 38.True or false: a grippy rubber sole gives more friction. (a) False (b) True
39. 39.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 9 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet

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