Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 714 · 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) chalk on a gym bar (b) a smooth steel slide (c) a box pushed on carpet (d) a tyre with deep treads
2. 2.True or false: a rough doormat gives more friction. (a) False (b) True
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
4. 4.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
5. 5.True or false: powder on a carrom board gives less friction. (a) False (b) True
6. 6.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
7. 7.🔍 Which is the odd one out? (a) powder on a carrom board (b) a smooth steel slide (c) chalk on a gym bar (d) oil on a squeaky hinge
8. 8.True or false: a box pushed on carpet gives more friction. (a) False (b) True
9. 9.True or false: skating on ice gives less friction. (a) True (b) False
10. 10.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, sandpaper 13 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a wooden plank (d) a glass sheet
12. 12.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
13. 13.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) sand on a slippery path (d) oil on a squeaky hinge
14. 14.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
15. 15.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
16. 16.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 10 N, a glass sheet 4 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
18. 18.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
19. 19.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
20. 20.🛞 Friction acts … (a) with the motion (b) against the motion (c) only on ice (d) only upwards
21. 21.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
22. 22.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) a rough doormat (d) powder on a carrom board
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 4 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 5 N, a wooden plank 7 N, sandpaper 8 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 8 N, a carpet 11 N, ice 3 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
26. 26.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
27. 27.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
28. 28.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 1 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
30. 30.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) a tyre with deep treads (d) a wet tiled floor
31. 31.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a wet tiled floor (d) a grippy rubber sole
32. 32.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
33. 33.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 8 N, sandpaper 10 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
35. 35.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
36. 36.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wet tiled floor (c) chalk on a gym bar (d) a tyre with deep treads
37. 37.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
38. 38.🛞 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 carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
39. 39.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank

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