Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 726 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 6 N, sandpaper 7 N, ice 2 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
2. 2.True or false: a tyre with deep treads gives less 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 8 N, a carpet 11 N, ice 2 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
4. 4.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) a grippy rubber sole (d) skating on ice
5. 5.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
6. 6.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
7. 7.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
8. 8.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
9. 9.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 2 N, a carpet 5 N. How many newtons more were needed on sandpaper than on ice?
11. 11.🔍 Which is the odd one out? (a) a wet tiled floor (b) a smooth steel slide (c) a grippy rubber sole (d) powder on a carrom board
12. 12.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
13. 13.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 6 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
15. 15.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 5 N, a carpet 6 N, sandpaper 9 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
17. 17.🔍 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
18. 18.True or false: a grippy rubber sole gives less friction. (a) False (b) True
19. 19.True or false: sand on a slippery path gives more friction. (a) False (b) True
20. 20.True or false: a wet tiled floor gives less friction. (a) True (b) False
21. 21.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a wooden plank 4 N, a carpet 5 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
23. 23.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 7 N, a carpet 11 N, ice 3 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
25. 25.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, sandpaper 10 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, sandpaper 9 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
28. 28.True or false: a tyre with deep treads gives more friction. (a) True (b) False
29. 29.True or false: chalk on a gym bar gives less friction. (a) True (b) False
30. 30.True or false: a wet tiled floor gives more friction. (a) True (b) False
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 12 N, ice 3 N, a glass sheet 6 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 11 N, sandpaper 15 N, ice 4 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
34. 34.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) sandpaper (d) polished marble
35. 35.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
36. 36.True or false: a rough doormat gives less friction. (a) False (b) True
37. 37.True or false: a box pushed on carpet gives more friction. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 4 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
39. 39.True or false: sand on a slippery path gives less friction. (a) False (b) True
40. 40.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction

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