Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 204 · 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 surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) glass (d) sandpaper
2. 2.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, ice 1 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
4. 4.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) powder on a carrom board (d) chalk on a gym bar
5. 5.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
6. 6.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
7. 7.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) a smooth steel slide (d) skating on ice
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 1 N, a glass sheet 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
9. 9.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
10. 10.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
11. 11.True or false: a grippy rubber sole gives less friction. (a) False (b) True
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 6 N, sandpaper 7 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
14. 14.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
15. 15.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
16. 16.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) sand on a slippery path (d) chalk on a gym bar
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, sandpaper 11 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
18. 18.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a wheel on ball bearings (d) oil on a squeaky hinge
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 2 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
20. 20.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, ice 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
23. 23.True or false: a tyre with deep treads gives less friction. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a rough doormat (d) powder on a carrom board
25. 25.True or false: a box pushed on carpet gives less friction. (a) False (b) True
26. 26.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
28. 28.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 9 N, sandpaper 11 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
30. 30.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, sandpaper 13 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
32. 32.True or false: a rough doormat gives more friction. (a) False (b) True
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a wooden plank 8 N, a carpet 9 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
34. 34.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
35. 35.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 10 N, a carpet 12 N. How many newtons more were needed on a carpet than on ice?
37. 37.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 8 N, a glass sheet 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
39. 39.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wheel on ball bearings (c) a rough doormat (d) chalk on a gym bar
40. 40.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True

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