Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 161 · 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.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
2. 2.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 9 N, ice 3 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
4. 4.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a grippy rubber sole (c) sand on a slippery path (d) a wheel on ball bearings
5. 5.🔍 Which is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) chalk on a gym bar (d) a grippy rubber sole
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 5 N, sandpaper 9 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
7. 7.🛞 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 7 N, sandpaper 10 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
8. 8.True or false: a rough doormat gives less friction. (a) False (b) True
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a glass sheet 3 N, a carpet 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
10. 10.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
11. 11.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
12. 12.🛞 More or less friction: oil on a squeaky hinge? (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 wooden plank 5 N, a carpet 8 N, sandpaper 11 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) a carpet
14. 14.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a box pushed on carpet (d) oil on a squeaky hinge
15. 15.True or false: sand on a slippery path gives more friction. (a) False (b) True
16. 16.True or false: powder on a carrom board gives more friction. (a) False (b) True
17. 17.True or false: skating on ice gives less friction. (a) True (b) False
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 11 N, ice 4 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
19. 19.True or false: a box pushed on carpet gives more friction. (a) False (b) True
20. 20.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
21. 21.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
22. 22.True or false: a grippy rubber sole 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: a wooden plank 5 N, a carpet 8 N, sandpaper 12 N, ice 1 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
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: sandpaper 11 N, ice 2 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
26. 26.True or false: a smooth steel slide gives more friction. (a) True (b) False
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 7 N, sandpaper 10 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
28. 28.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
29. 29.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
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 6 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
31. 31.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
32. 32.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
33. 33.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
34. 34.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 9 N, ice 4 N, a glass sheet 5 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 6 N, sandpaper 8 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
37. 37.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) a grippy rubber sole (d) a tyre with deep treads
38. 38.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) a smooth steel slide (d) a rough doormat
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 2 N, a glass sheet 6 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 7 N, ice 2 N, a glass sheet 3 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper

Free engineering lessons, practice and worksheets at talentjr.in/engineering-for-kids