Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 784 · 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 box pushed on carpet (b) a wheel on ball bearings (c) chalk on a gym bar (d) a tyre with deep treads
2. 2.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a rough doormat (c) a smooth steel slide (d) skating on ice
3. 3.True or false: a grippy rubber sole gives more friction. (a) True (b) False
4. 4.True or false: sand on a slippery path gives more friction. (a) False (b) True
5. 5.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, a carpet 8 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
7. 7.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
8. 8.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) glass (d) ice
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 10 N, a carpet 14 N, ice 4 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
10. 10.🔍 Which is the odd one out? (a) sand on a slippery path (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) a wet tiled floor
11. 11.True or false: skating on ice gives more friction. (a) True (b) False
12. 12.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
13. 13.🔍 Which is the odd one out? (a) a wet tiled floor (b) a rough doormat (c) sand on a slippery path (d) chalk on a gym bar
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 9 N, sandpaper 11 N, ice 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
15. 15.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) chalk on a gym bar (c) skating on ice (d) a wheel on ball bearings
16. 16.True or false: a grippy rubber sole gives less friction. (a) False (b) True
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, a carpet 14 N, ice 2 N. How many newtons more were needed on a carpet than on ice?
18. 18.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 11 N, a glass sheet 1 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a carpet 6 N, sandpaper 7 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
21. 21.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to save rubber (d) to grip the road
22. 22.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
23. 23.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
24. 24.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) cold (d) magnetic
25. 25.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
26. 26.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
27. 27.🛞 Friction acts … (a) only upwards (b) against the motion (c) only on ice (d) with the motion
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 4 N, a glass sheet 8 N, a wooden plank 10 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) ice
29. 29.🛞 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 14 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) a carpet
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
31. 31.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
32. 32.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
33. 33.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
34. 34.True or false: a smooth steel slide gives less friction. (a) False (b) True
35. 35.True or false: chalk on a gym bar gives more friction. (a) True (b) False
36. 36.🛞 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 1 N, a glass sheet 5 N. How many newtons more were needed on a carpet than on ice?
37. 37.🛞 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 7 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
38. 38.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a carpet 7 N, sandpaper 8 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
40. 40.True or false: a wet tiled floor gives more friction. (a) False (b) True

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