Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 98 · 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 smooth steel slide (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) a tyre with deep treads
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 4 N, a glass sheet 8 N, a carpet 12 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
3. 3.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
4. 4.True or false: sand on a slippery path gives more friction. (a) True (b) False
5. 5.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
6. 6.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
7. 7.True or false: a box pushed on carpet gives more friction. (a) False (b) True
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, ice 4 N, a glass sheet 5 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 5 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, a glass sheet 3 N, a wooden plank 6 N, a carpet 9 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 8 N, sandpaper 9 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
12. 12.True or false: sand on a slippery path gives less friction. (a) False (b) True
13. 13.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) glass (c) sandpaper (d) polished marble
14. 14.🔍 Which is the odd one out? (a) a tyre with deep treads (b) chalk on a gym bar (c) a wet tiled floor (d) sand on a slippery path
15. 15.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 2 N, a carpet 5 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
17. 17.True or false: a tyre with deep treads gives less friction. (a) False (b) True
18. 18.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
19. 19.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) a grippy rubber sole (d) a wet tiled floor
20. 20.True or false: a rough doormat gives less friction. (a) False (b) True
21. 21.True or false: a wet tiled floor gives more friction. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) chalk on a gym bar (c) a tyre with deep treads (d) sand on a slippery path
23. 23.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
24. 24.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
25. 25.True or false: a grippy rubber sole gives less friction. (a) True (b) False
26. 26.True or false: a rough doormat gives more friction. (a) False (b) True
27. 27.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to go slower (c) to look nice (d) to save rubber
28. 28.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 11 N, sandpaper 15 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 8 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, sandpaper 8 N, ice 2 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
32. 32.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 3 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
34. 34.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a smooth steel slide (c) a box pushed on carpet (d) a wet tiled floor
35. 35.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a grippy rubber sole (c) a box pushed on carpet (d) a wheel on ball bearings
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 7 N, a glass sheet 1 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
37. 37.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) skating on ice (d) a tyre with deep treads
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 2 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
39. 39.True or false: chalk on a gym bar gives more friction. (a) False (b) True
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 2 N, a carpet 3 N, sandpaper 7 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper

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