Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 576 · 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 3 N, a glass sheet 4 N, a carpet 7 N, sandpaper 11 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
2. 2.True or false: sand on a slippery path gives less friction. (a) True (b) False
3. 3.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
4. 4.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) magnetic (d) warm
5. 5.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) a smooth steel slide (d) skating on ice
6. 6.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to save rubber (d) to grip the road
7. 7.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a wheel on ball bearings (d) oil on a squeaky hinge
8. 8.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
9. 9.🛞 Friction acts … (a) against the motion (b) only upwards (c) only on ice (d) with the motion
10. 10.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
11. 11.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a smooth steel slide (c) a grippy rubber sole (d) a tyre with deep treads
12. 12.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) ice (c) sandpaper (d) glass
13. 13.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a tyre with deep treads (d) sand on a slippery path
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, a glass sheet 4 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
16. 16.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
17. 17.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
18. 18.🛞 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 6 N, a carpet 8 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 4 N, a glass sheet 7 N, a wooden plank 8 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
20. 20.🛞 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 5 N, a carpet 6 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
21. 21.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
22. 22.True or false: a wet tiled floor gives less friction. (a) True (b) False
23. 23.🛞 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 3 N, a carpet 4 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
24. 24.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 11 N, ice 4 N, a glass sheet 6 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
26. 26.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) a box pushed on carpet (d) oil on a squeaky hinge
27. 27.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
28. 28.🔍 Which is the odd one out? (a) a wet tiled floor (b) skating on ice (c) a tyre with deep treads (d) a wheel on ball bearings
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, sandpaper 11 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
30. 30.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
31. 31.True or false: a tyre with deep treads gives less friction. (a) False (b) True
32. 32.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 11 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on a glass sheet?
34. 34.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) chalk on a gym bar (d) a tyre with deep treads
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 9 N, ice 4 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
36. 36.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
37. 37.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
38. 38.True or false: chalk on a gym bar gives less friction. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) a tyre with deep treads (d) a wet tiled floor
40. 40.True or false: skating on ice gives less friction. (a) True (b) False

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