Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 730 · 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: chalk on a gym bar gives less friction. (a) False (b) True
2. 2.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
3. 3.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
4. 4.🛞 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 7 N, a carpet 11 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
5. 5.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wheel on ball bearings (c) skating on ice (d) sand on a slippery path
7. 7.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
8. 8.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
9. 9.True or false: a grippy rubber sole gives less friction. (a) False (b) True
10. 10.🛞 Rubbing your hands fast makes them … (a) magnetic (b) cold (c) wet (d) warm
11. 11.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
12. 12.🛞 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 9 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
14. 14.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on a carpet than on ice?
16. 16.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a rough doormat (c) a wet tiled floor (d) sand on a slippery path
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
18. 18.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
19. 19.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a glass sheet 5 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
21. 21.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a grippy rubber sole (d) powder on a carrom board
22. 22.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
23. 23.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) a tyre with deep treads (d) oil on a squeaky hinge
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
25. 25.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
26. 26.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
27. 27.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
28. 28.True or false: skating on ice gives more friction. (a) True (b) False
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 1 N, a wooden plank 2 N, a carpet 4 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 11 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
31. 31.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
32. 32.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to look nice (c) to save rubber (d) to go slower
33. 33.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
34. 34.True or false: a tyre with deep treads gives more friction. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) a rough doormat (d) sand on a slippery path
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, ice 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
37. 37.🛞 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 7 N, a carpet 9 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
38. 38.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
39. 39.True or false: skating on ice gives less friction. (a) False (b) True
40. 40.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful

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