Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 45 · 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: a box pushed on carpet gives more friction. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a grippy rubber sole (c) sand on a slippery path (d) chalk on a gym bar
3. 3.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
4. 4.True or false: powder on a carrom board gives more friction. (a) False (b) True
5. 5.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
8. 8.True or false: a wet tiled floor gives less friction. (a) True (b) False
9. 9.🔍 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) skating on ice
10. 10.🔍 Which is the odd one out? (a) a wet tiled floor (b) a grippy rubber sole (c) sand on a slippery path (d) a rough doormat
11. 11.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
12. 12.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
13. 13.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
14. 14.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 2 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
16. 16.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
17. 17.True or false: a grippy rubber sole gives more friction. (a) False (b) True
18. 18.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 9 N, a carpet 13 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
20. 20.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
21. 21.🛞 Why are tyres made with deep treads? (a) to look nice (b) to save rubber (c) to grip the road (d) to go slower
22. 22.True or false: a rough doormat gives less 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.True or false: a smooth steel slide gives less friction. (a) False (b) True
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 5 N, sandpaper 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
26. 26.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 10 N, a glass sheet 4 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
28. 28.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) sandpaper (d) polished marble
29. 29.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, ice 2 N, a glass sheet 4 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
31. 31.🛞 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, sandpaper 7 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
32. 32.🛞 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 6 N, sandpaper 7 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) ice (d) a wooden plank
33. 33.🛞 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 9 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 8 N, sandpaper 11 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
36. 36.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) magnetic (d) wet
37. 37.🔍 Which is the odd one out? (a) powder on a carrom board (b) skating on ice (c) a box pushed on carpet (d) oil on a squeaky hinge
38. 38.🛞 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 6 N, a carpet 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 8 N, a glass sheet 2 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
40. 40.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem

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