Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 279 · 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.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) a grippy rubber sole (d) skating on ice
2. 2.True or false: a grippy rubber sole gives less friction. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) a box pushed on carpet (b) oil on a squeaky hinge (c) chalk on a gym bar (d) sand on a slippery path
4. 4.True or false: sand on a slippery path gives less friction. (a) False (b) True
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 1 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
6. 6.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) polished marble (d) sandpaper
7. 7.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
8. 8.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
9. 9.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) oil on a squeaky hinge (d) sand on a slippery path
10. 10.True or false: powder on a carrom board gives less friction. (a) True (b) False
11. 11.True or false: a rough doormat gives less friction. (a) True (b) False
12. 12.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) warm (d) wet
13. 13.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
14. 14.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
15. 15.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to go slower (d) to grip the road
16. 16.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) a smooth steel slide (d) chalk on a gym bar
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 8 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet
18. 18.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
19. 19.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
20. 20.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
21. 21.True or false: a smooth steel slide gives more friction. (a) False (b) True
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 4 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
23. 23.🔍 Which is the odd one out? (a) a tyre with deep treads (b) oil on a squeaky hinge (c) skating on ice (d) a wet tiled floor
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 10 N, ice 3 N, a glass sheet 5 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, sandpaper 5 N, ice 2 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
26. 26.True or false: a tyre with deep treads gives less friction. (a) False (b) True
27. 27.🛞 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, sandpaper 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
28. 28.True or false: a rough doormat gives more friction. (a) True (b) False
29. 29.🛞 Friction acts … (a) only upwards (b) only on ice (c) against the motion (d) with the motion
30. 30.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
31. 31.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 2 N, a wooden plank 3 N, a carpet 5 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
33. 33.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
34. 34.🛞 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 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) ice
35. 35.🛞 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 4 N, a carpet 7 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 9 N, ice 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, sandpaper 8 N, ice 3 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
38. 38.🛞 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 wooden plank 7 N, a carpet 9 N. How many newtons more were needed on a carpet than on ice?
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a carpet 5 N, sandpaper 8 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
40. 40.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) skating on ice (d) chalk on a gym bar

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