Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 852 · 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.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
2. 2.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
3. 3.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
4. 4.True or false: sand on a slippery path gives more friction. (a) False (b) True
5. 5.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
6. 6.🔍 Which is the odd one out? (a) skating on ice (b) a wheel on ball bearings (c) a box pushed on carpet (d) a smooth steel slide
7. 7.True or false: a box pushed on carpet gives more friction. (a) True (b) False
8. 8.True or false: a box pushed on carpet gives less friction. (a) True (b) False
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a carpet 8 N, sandpaper 9 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
10. 10.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) skating on ice (c) sand on a slippery path (d) powder on a carrom board
11. 11.🛞 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 6 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
12. 12.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
13. 13.True or false: a rough doormat gives more friction. (a) True (b) False
14. 14.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
15. 15.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to grip the road (d) to look nice
16. 16.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a grippy rubber sole (c) sand on a slippery path (d) a smooth steel slide
17. 17.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wheel on ball bearings (c) a smooth steel slide (d) oil on a squeaky hinge
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
19. 19.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 7 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
22. 22.True or false: a smooth steel slide gives more friction. (a) False (b) True
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a glass sheet 2 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
24. 24.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) skating on ice (d) a box pushed on carpet
25. 25.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
26. 26.True or false: a wet tiled floor gives more friction. (a) True (b) False
27. 27.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 1 N, a glass sheet 5 N, a wooden plank 6 N. How many newtons more were needed on a carpet than on ice?
29. 29.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
30. 30.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
31. 31.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) glass (d) ice
32. 32.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a grippy rubber sole (d) oil on a squeaky hinge
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 6 N, sandpaper 7 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
34. 34.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a smooth steel slide (c) oil on a squeaky hinge (d) a wheel on ball bearings
35. 35.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
36. 36.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
37. 37.🔍 Which is the odd one out? (a) powder on a carrom board (b) a rough doormat (c) a smooth steel slide (d) a wet tiled floor
38. 38.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, ice 2 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 8 N, sandpaper 11 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice

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