Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 926 · 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.True or false: a tyre with deep treads gives more friction. (a) False (b) True
2. 2.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
3. 3.🔍 Which is the odd one out? (a) powder on a carrom board (b) a rough doormat (c) oil on a squeaky hinge (d) skating on ice
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 4 N, a glass sheet 8 N, a wooden plank 9 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
6. 6.🛞 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 7 N, sandpaper 10 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
7. 7.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
8. 8.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
9. 9.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
10. 10.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 10 N, a carpet 14 N. How many newtons more were needed on a carpet than on ice?
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 2 N, a wooden plank 3 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
13. 13.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
14. 14.🛞 More or less friction: skating on ice? (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 wooden plank 5 N, sandpaper 8 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
16. 16.True or false: a wet tiled floor gives less friction. (a) True (b) False
17. 17.🛞 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 carpet 6 N, sandpaper 10 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
18. 18.True or false: a smooth steel slide 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 wooden plank 4 N, a carpet 6 N, sandpaper 10 N, a glass sheet 1 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
20. 20.🛞 Friction acts … (a) only upwards (b) against the motion (c) only on ice (d) with the motion
21. 21.True or false: a box pushed on carpet gives less friction. (a) True (b) False
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 6 N, a carpet 10 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
23. 23.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) sand on a slippery path (d) a wet tiled floor
24. 24.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to look nice (c) to go slower (d) to save rubber
25. 25.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
26. 26.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a box pushed on carpet (d) a wheel on ball bearings
27. 27.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a wooden plank 5 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
29. 29.True or false: a tyre with deep treads gives less friction. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a tyre with deep treads (d) a smooth steel slide
31. 31.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) sand on a slippery path (d) a rough doormat
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, sandpaper 13 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
33. 33.True or false: a box pushed on carpet gives more friction. (a) False (b) True
34. 34.True or false: a rough doormat gives less friction. (a) True (b) False
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 13 N, ice 4 N, a glass sheet 7 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
36. 36.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
37. 37.🔍 Which is the odd one out? (a) chalk on a gym bar (b) oil on a squeaky hinge (c) powder on a carrom board (d) a wheel on ball bearings
38. 38.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, ice 2 N, a glass sheet 4 N, a wooden plank 5 N. How many newtons more were needed on a carpet than on ice?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 6 N, sandpaper 9 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper

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