Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 117 · 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: brakes stopping a cycle? (a) helpful (b) a problem
2. 2.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
3. 3.True or false: skating on ice gives more friction. (a) True (b) False
4. 4.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
6. 6.🛞 Friction acts … (a) against the motion (b) only on ice (c) with the motion (d) only upwards
7. 7.🔍 Which is the odd one out? (a) a smooth steel slide (b) chalk on a gym bar (c) a wheel on ball bearings (d) powder on a carrom board
8. 8.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) skating on ice (d) sand on a slippery path
9. 9.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
10. 10.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
11. 11.True or false: a smooth steel slide gives less friction. (a) True (b) False
12. 12.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
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: tyres wearing down? (a) a problem (b) helpful
15. 15.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
16. 16.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
17. 17.🔍 Which is the odd one out? (a) a rough doormat (b) powder on a carrom board (c) chalk on a gym bar (d) a box pushed on carpet
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 10 N, a carpet 11 N. How many newtons more were needed on a carpet than on ice?
19. 19.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
20. 20.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, ice 1 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 10 N, ice 2 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a carpet 6 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
24. 24.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 3 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on a carpet than on ice?
26. 26.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
27. 27.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, sandpaper 10 N, a glass sheet 3 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
29. 29.True or false: a grippy rubber sole gives less friction. (a) True (b) False
30. 30.True or false: a wet tiled floor gives more friction. (a) False (b) True
31. 31.True or false: a tyre with deep treads gives less friction. (a) False (b) True
32. 32.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
33. 33.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) a tyre with deep treads (d) oil on a squeaky hinge
34. 34.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 9 N, a carpet 11 N, ice 4 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, ice 3 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 5 N, a carpet 8 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
38. 38.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a tyre with deep treads (d) a smooth steel slide
39. 39.True or false: sand on a slippery path 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 carpet 8 N, sandpaper 12 N, ice 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper

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