Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 544 · 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: ice 4 N, a glass sheet 5 N, a wooden plank 8 N, a carpet 9 N. How many newtons more were needed on a carpet than on ice?
2. 2.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
3. 3.🛞 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 wooden plank 5 N, a carpet 6 N. How many newtons more were needed on a carpet than on ice?
4. 4.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
5. 5.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
6. 6.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to go slower (d) to look nice
7. 7.True or false: a tyre with deep treads gives more friction. (a) True (b) False
8. 8.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
9. 9.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
10. 10.🛞 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, sandpaper 11 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
11. 11.🔍 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) skating on ice
12. 12.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, a carpet 10 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
14. 14.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a box pushed on carpet (d) a wet tiled floor
15. 15.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) powder on a carrom board (d) a tyre with deep treads
16. 16.🛞 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, sandpaper 12 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
17. 17.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a carpet 9 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🛞 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 5 N, a carpet 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) a glass sheet
20. 20.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
21. 21.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
22. 22.🔍 Which is the odd one out? (a) a rough doormat (b) a smooth steel slide (c) a wheel on ball bearings (d) oil on a squeaky hinge
23. 23.True or false: sand on a slippery path gives more friction. (a) False (b) True
24. 24.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
25. 25.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
26. 26.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
27. 27.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
28. 28.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
29. 29.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, ice 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
31. 31.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) powder on a carrom board (d) chalk on a gym bar
32. 32.True or false: a grippy rubber sole gives less friction. (a) True (b) False
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, ice 4 N, a glass sheet 8 N, a carpet 11 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
34. 34.True or false: sand on a slippery path gives less friction. (a) False (b) True
35. 35.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
36. 36.True or false: skating on ice gives more friction. (a) True (b) False
37. 37.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
38. 38.True or false: a box pushed on carpet gives less friction. (a) True (b) False
39. 39.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 4 N, a wooden plank 7 N, a carpet 9 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank

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