Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 121 · 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: striking a matchstick? (a) helpful (b) a problem
2. 2.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) cold (d) warm
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
4. 4.🔍 Which is the odd one out? (a) a box pushed on carpet (b) powder on a carrom board (c) a wheel on ball bearings (d) a wet tiled floor
5. 5.🛞 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, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
6. 6.🛞 Why are tyres made with deep treads? (a) to go slower (b) to grip the road (c) to save rubber (d) to look nice
7. 7.True or false: a grippy rubber sole gives less friction. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) a wet tiled floor (d) a rough doormat
9. 9.🛞 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 1 N, a wooden plank 5 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
10. 10.True or false: a smooth steel slide gives less friction. (a) True (b) False
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 8 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
12. 12.🛞 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 3 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 2 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
14. 14.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
15. 15.🛞 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, sandpaper 10 N, ice 2 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
16. 16.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
17. 17.🛞 Friction acts … (a) only on ice (b) with the motion (c) only upwards (d) against the motion
18. 18.True or false: a grippy rubber sole gives more friction. (a) False (b) True
19. 19.🛞 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 11 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
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 wooden plank 6 N, sandpaper 10 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
21. 21.True or false: a smooth steel slide gives more friction. (a) True (b) False
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 10 N, sandpaper 11 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a glass sheet 8 N, a wooden plank 12 N. How many newtons more were needed on sandpaper than on ice?
24. 24.🛞 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 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
26. 26.🛞 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 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) sandpaper
27. 27.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
28. 28.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
29. 29.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
30. 30.True or false: a box pushed on carpet gives less friction. (a) False (b) True
31. 31.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 3 N, a wooden plank 5 N, a carpet 8 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
33. 33.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) a box pushed on carpet (d) a tyre with deep treads
34. 34.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
35. 35.🛞 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, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
36. 36.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) skating on ice (d) oil on a squeaky hinge
37. 37.🛞 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 10 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
39. 39.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
40. 40.True or false: sand on a slippery path gives more friction. (a) False (b) True

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