Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 111 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, a carpet 10 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
2. 2.🛞 Why are tyres made with deep treads? (a) to go slower (b) to grip the road (c) to save rubber (d) to look nice
3. 3.True or false: sand on a slippery path gives less friction. (a) True (b) False
4. 4.True or false: sand on a slippery path gives more friction. (a) False (b) True
5. 5.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) warm (d) wet
6. 6.True or false: skating on ice gives more friction. (a) False (b) True
7. 7.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
8. 8.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a wheel on ball bearings (d) a wet tiled floor
9. 9.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, ice 3 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
11. 11.🔍 Which is the odd one out? (a) chalk on a gym bar (b) oil on a squeaky hinge (c) sand on a slippery path (d) a grippy rubber sole
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 9 N, ice 2 N, a glass sheet 6 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) a carpet
13. 13.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
14. 14.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a smooth steel slide (c) chalk on a gym bar (d) skating on ice
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 6 N, a carpet 7 N, sandpaper 11 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
17. 17.🛞 Friction acts … (a) only upwards (b) against the motion (c) with the motion (d) only on ice
18. 18.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) a smooth steel slide (d) a tyre with deep treads
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 10 N, ice 4 N, a glass sheet 5 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
20. 20.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
21. 21.True or false: a wet tiled floor gives less friction. (a) True (b) False
22. 22.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
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 5 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 10 N, sandpaper 12 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: a glass sheet 7 N, a wooden plank 8 N, sandpaper 12 N, ice 3 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
26. 26.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) polished marble (d) sandpaper
27. 27.🛞 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 wooden plank 6 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
28. 28.🛞 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 8 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) ice
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, ice 4 N, a wooden plank 6 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
30. 30.True or false: chalk on a gym bar gives more friction. (a) False (b) True
31. 31.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 12 N, sandpaper 15 N. How many newtons more were needed on sandpaper than on a glass sheet?
33. 33.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a wet tiled floor (d) a rough doormat
34. 34.🔍 Which is the odd one out? (a) powder on a carrom board (b) skating on ice (c) a box pushed on carpet (d) a smooth steel slide
35. 35.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
36. 36.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
37. 37.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
38. 38.True or false: a grippy rubber sole gives more friction. (a) True (b) False
39. 39.True or false: a wet tiled floor gives more friction. (a) True (b) False
40. 40.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction

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