Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 681 · 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.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
2. 2.True or false: chalk on a gym bar gives more friction. (a) False (b) True
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 13 N, ice 2 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a wooden plank
4. 4.True or false: a wet tiled floor gives less friction. (a) True (b) False
5. 5.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a glass sheet 5 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
7. 7.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
8. 8.🛞 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 carpet 10 N, sandpaper 14 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
9. 9.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
10. 10.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass
11. 11.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a carpet 6 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a grippy rubber sole (c) a rough doormat (d) a tyre with deep treads
14. 14.🛞 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 8 N, a carpet 12 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a wooden plank 7 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, a glass sheet 3 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
17. 17.🔍 Which is the odd one out? (a) powder on a carrom board (b) sand on a slippery path (c) a wet tiled floor (d) skating on ice
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 5 N, a carpet 9 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
19. 19.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
20. 20.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, sandpaper 9 N, ice 1 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) ice (d) a wooden plank
22. 22.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wet tiled floor (c) skating on ice (d) a grippy rubber sole
23. 23.🛞 How can we reduce friction in a machine? (a) press parts harder (b) oil the moving parts (c) make parts rough (d) add sand
24. 24.True or false: chalk on a gym bar gives less friction. (a) True (b) False
25. 25.🛞 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, ice 2 N, a glass sheet 3 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 8 N, sandpaper 11 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
27. 27.True or false: sand on a slippery path gives more friction. (a) True (b) False
28. 28.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 5 N, sandpaper 6 N, a glass sheet 2 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
31. 31.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
32. 32.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a wet tiled floor (d) chalk on a gym bar
33. 33.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
34. 34.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) wet (d) magnetic
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 9 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
36. 36.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
37. 37.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) a rough doormat (d) a smooth steel slide
38. 38.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
39. 39.True or false: a wet tiled floor gives more friction. (a) True (b) False
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 11 N, ice 2 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?

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