Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 256 · 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) a wet tiled floor (b) a rough doormat (c) skating on ice (d) a wheel on ball bearings
2. 2.🛞 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, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
3. 3.True or false: sand on a slippery path gives more friction. (a) True (b) False
4. 4.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
5. 5.True or false: a smooth steel slide gives more friction. (a) True (b) False
6. 6.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
7. 7.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
8. 8.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
9. 9.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
10. 10.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) sand on a slippery path (d) a tyre with deep treads
11. 11.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
12. 12.🛞 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 8 N, ice 1 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
13. 13.True or false: sand on a slippery path gives less friction. (a) False (b) True
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 2 N, a glass sheet 6 N, a carpet 7 N. How many newtons more were needed on sandpaper than on ice?
15. 15.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wheel on ball bearings (c) powder on a carrom board (d) oil on a squeaky hinge
16. 16.True or false: skating on ice gives more friction. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) sand on a slippery path (d) a wet tiled floor
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a carpet 10 N, sandpaper 13 N, ice 4 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
19. 19.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
20. 20.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
21. 21.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 4 N, a glass sheet 5 N, a carpet 6 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
24. 24.🔍 Which is the odd one out? (a) a tyre with deep treads (b) oil on a squeaky hinge (c) powder on a carrom board (d) a wheel on ball bearings
25. 25.🛞 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, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
26. 26.🔍 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) a tyre with deep treads
27. 27.True or false: powder on a carrom board gives more friction. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) a tyre with deep treads (d) a grippy rubber sole
29. 29.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
30. 30.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) sand on a slippery path (d) skating on ice
31. 31.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
32. 32.True or false: a grippy rubber sole gives more friction. (a) False (b) True
33. 33.True or false: chalk on a gym bar gives more friction. (a) True (b) False
34. 34.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
35. 35.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to grip the road (d) to look nice
36. 36.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
37. 37.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, a carpet 13 N, ice 2 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
39. 39.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 12 N, ice 2 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

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