Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 102 · 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) a grippy rubber sole (b) a box pushed on carpet (c) skating on ice (d) a tyre with deep treads
2. 2.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
3. 3.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to save rubber (d) to go slower
4. 4.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
6. 6.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 10 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
8. 8.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) powder on a carrom board (d) a grippy rubber sole
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, a glass sheet 1 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
10. 10.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
11. 11.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
12. 12.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 8 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
14. 14.True or false: a wheel on ball bearings 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: a carpet 10 N, ice 3 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on a glass sheet?
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 4 N, a carpet 6 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
18. 18.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
19. 19.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) a smooth steel slide (d) a rough doormat
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 5 N, sandpaper 6 N, a glass sheet 1 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 6 N, ice 2 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) oil on a squeaky hinge (d) a wet tiled floor
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 7 N, ice 1 N, a glass sheet 2 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, ice 2 N, a wooden plank 3 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
25. 25.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) a tyre with deep treads (d) oil on a squeaky hinge
26. 26.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, sandpaper 15 N, ice 4 N, a glass sheet 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
28. 28.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 8 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
30. 30.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) a rough doormat (d) a wheel on ball bearings
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 3 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) ice (d) a glass sheet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 15 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
33. 33.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wet tiled floor (c) a box pushed on carpet (d) a tyre with deep treads
34. 34.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
35. 35.True or false: a rough doormat gives more friction. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) powder on a carrom board (b) a tyre with deep treads (c) a wheel on ball bearings (d) skating on ice
37. 37.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
38. 38.🛞 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 9 N, ice 3 N. How many newtons more were needed on a carpet than on ice?
39. 39.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a box pushed on carpet (c) skating on ice (d) a smooth steel slide
40. 40.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction

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