Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 776 · 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.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
2. 2.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
4. 4.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
5. 5.True or false: a box pushed on carpet gives less friction. (a) False (b) True
6. 6.🛞 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 wooden plank 3 N, a carpet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a wooden plank 4 N, a carpet 5 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 6 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) a wooden plank
9. 9.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 10 N, sandpaper 12 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a carpet 4 N, sandpaper 5 N, ice 2 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, a glass sheet 2 N, a wooden plank 4 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
13. 13.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a box pushed on carpet (c) sand on a slippery path (d) a rough doormat
14. 14.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
15. 15.🛞 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 8 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
16. 16.True or false: powder on a carrom board gives less friction. (a) True (b) False
17. 17.True or false: sand on a slippery path gives more friction. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a rough doormat (c) a tyre with deep treads (d) a smooth steel slide
19. 19.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
20. 20.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) a wet tiled floor (d) a rough doormat
21. 21.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
22. 22.True or false: a grippy rubber sole gives less friction. (a) True (b) False
23. 23.True or false: chalk on a gym bar gives more friction. (a) True (b) False
24. 24.True or false: a grippy rubber sole gives more friction. (a) True (b) False
25. 25.True or false: powder on a carrom board gives more friction. (a) True (b) False
26. 26.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
27. 27.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 10 N, ice 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
29. 29.🛞 Friction acts … (a) only upwards (b) with the motion (c) against the motion (d) only on ice
30. 30.True or false: skating on ice gives more friction. (a) True (b) False
31. 31.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
32. 32.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 1 N, a glass sheet 4 N, a wooden plank 8 N. How many newtons more were needed on a carpet than on ice?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) polished marble (d) sandpaper
36. 36.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) powder on a carrom board (d) a grippy rubber sole
37. 37.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wheel on ball bearings (c) a wet tiled floor (d) powder on a carrom board
38. 38.True or false: a box pushed on carpet gives more friction. (a) True (b) False
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 3 N, a glass sheet 5 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
40. 40.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem

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