Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 457 · 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: a wooden plank 7 N, a carpet 11 N, ice 2 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 15 N, ice 3 N, a glass sheet 7 N, a wooden plank 11 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
3. 3.🔍 Which is the odd one out? (a) sand on a slippery path (b) chalk on a gym bar (c) a wheel on ball bearings (d) a rough doormat
4. 4.True or false: a rough doormat gives more friction. (a) True (b) False
5. 5.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
6. 6.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
7. 7.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) polished marble (d) glass
8. 8.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
9. 9.True or false: skating on ice gives more friction. (a) True (b) False
10. 10.🛞 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 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
11. 11.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
12. 12.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
13. 13.True or false: a rough doormat gives less friction. (a) False (b) True
14. 14.True or false: powder on a carrom board gives more friction. (a) False (b) True
15. 15.🛞 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 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, a glass sheet 3 N, a wooden plank 5 N, a carpet 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
17. 17.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 1 N, a glass sheet 5 N, a wooden plank 8 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 9 N, ice 2 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?
20. 20.True or false: a wet tiled floor gives more friction. (a) True (b) False
21. 21.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
22. 22.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a wheel on ball bearings (d) a grippy rubber sole
23. 23.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 10 N, ice 3 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
26. 26.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a rough doormat (c) a grippy rubber sole (d) a tyre with deep treads
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a carpet 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 10 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
29. 29.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
30. 30.🛞 Friction acts … (a) against the motion (b) with the motion (c) only on ice (d) only upwards
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) powder on a carrom board (c) a box pushed on carpet (d) sand on a slippery path
32. 32.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) cold (d) warm
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 3 N, a glass sheet 7 N, a wooden plank 10 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
34. 34.🔍 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
35. 35.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
36. 36.True or false: chalk on a gym bar gives less friction. (a) False (b) True
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 3 N, a glass sheet 4 N, a carpet 5 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 8 N. How many newtons more were needed on a carpet than on ice?
39. 39.True or false: chalk on a gym bar gives more friction. (a) True (b) False
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 1 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet

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