Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 648 · 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: sandpaper 7 N, ice 1 N, a wooden plank 2 N, a carpet 5 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
2. 2.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
3. 3.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
4. 4.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
5. 5.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
6. 6.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
7. 7.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a wheel on ball bearings (d) sand on a slippery path
8. 8.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
9. 9.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to save rubber (d) to grip the road
10. 10.True or false: powder on a carrom board gives more 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 5 N, a carpet 6 N, sandpaper 8 N, a glass sheet 3 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
12. 12.True or false: a smooth steel slide gives less friction. (a) False (b) True
13. 13.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
14. 14.True or false: chalk on a gym bar gives less friction. (a) False (b) True
15. 15.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
16. 16.True or false: chalk on a gym bar gives more friction. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a box pushed on carpet (c) a rough doormat (d) a tyre with deep treads
18. 18.True or false: skating on ice gives less friction. (a) False (b) True
19. 19.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) powder on a carrom board (d) a tyre with deep treads
21. 21.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a smooth steel slide (d) a tyre with deep treads
22. 22.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
23. 23.🛞 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 wooden plank 7 N, a carpet 8 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
24. 24.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
25. 25.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
26. 26.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
27. 27.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a grippy rubber sole (d) sand on a slippery path
28. 28.🛞 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 7 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
29. 29.True or false: a box pushed on carpet gives less friction. (a) True (b) False
30. 30.True or false: a rough doormat gives more friction. (a) False (b) True
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 6 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 2 N, a glass sheet 4 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
33. 33.🛞 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 wooden plank 9 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
34. 34.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) sandpaper (d) polished marble
35. 35.🔍 Which is the odd one out? (a) a rough doormat (b) a smooth steel slide (c) a grippy rubber sole (d) chalk on a gym bar
36. 36.🛞 Friction acts … (a) against the motion (b) only upwards (c) only on ice (d) with the motion
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 12 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
38. 38.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a carpet 9 N, sandpaper 11 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper

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