Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 562 · 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: a box pushed on carpet gives more friction. (a) True (b) False
3. 3.🛞 Friction acts … (a) only upwards (b) only on ice (c) against the motion (d) with the motion
4. 4.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) a box pushed on carpet (d) chalk on a gym bar
5. 5.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
6. 6.True or false: a smooth steel slide gives more friction. (a) False (b) True
7. 7.True or false: a tyre with deep treads gives less friction. (a) False (b) True
8. 8.True or false: chalk on a gym bar gives more friction. (a) True (b) False
9. 9.True or false: a grippy rubber sole gives less friction. (a) True (b) False
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 10 N, ice 3 N, a glass sheet 6 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
11. 11.🔍 Which is the odd one out? (a) a smooth steel slide (b) a rough doormat (c) oil on a squeaky hinge (d) a wheel on ball bearings
12. 12.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
13. 13.True or false: sand on a slippery path gives less friction. (a) True (b) False
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, ice 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
15. 15.True or false: a grippy rubber sole gives more friction. (a) True (b) False
16. 16.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
17. 17.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 6 N, a carpet 7 N. How many newtons more were needed on a carpet than on ice?
19. 19.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
20. 20.🛞 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 wooden plank 3 N, a carpet 6 N. How many newtons more were needed on a carpet than on ice?
21. 21.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
22. 22.🔍 Which is the odd one out? (a) skating on ice (b) chalk on a gym bar (c) a wet tiled floor (d) oil on a squeaky hinge
23. 23.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wet tiled floor (c) a rough doormat (d) a grippy rubber sole
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, a glass sheet 4 N, a wooden plank 6 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
25. 25.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
26. 26.True or false: a tyre with deep treads gives more friction. (a) False (b) True
27. 27.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
28. 28.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
29. 29.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
30. 30.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) wet (d) warm
31. 31.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
32. 32.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
33. 33.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 12 N, a carpet 13 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
35. 35.True or false: powder on a carrom board gives less friction. (a) False (b) True
36. 36.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
37. 37.True or false: a wet tiled floor gives less friction. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 1 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
39. 39.True or false: skating on ice gives less friction. (a) True (b) False
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 3 N, a glass sheet 6 N, a carpet 10 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper

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