Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 747 · 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 7 N, a carpet 9 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
2. 2.🛞 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 carpet 5 N, sandpaper 7 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
3. 3.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a smooth steel slide (c) oil on a squeaky hinge (d) skating on ice
4. 4.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) press parts harder (d) oil the moving parts
5. 5.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
6. 6.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
7. 7.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
8. 8.🛞 Friction acts … (a) with the motion (b) only upwards (c) against the motion (d) only on ice
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
10. 10.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
11. 11.True or false: a box pushed on carpet gives more friction. (a) False (b) True
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, sandpaper 8 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🔍 Which is the odd one out? (a) chalk on a gym bar (b) sand on a slippery path (c) a wheel on ball bearings (d) a box pushed on carpet
14. 14.True or false: a smooth steel slide gives less friction. (a) False (b) True
15. 15.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) cold (d) warm
16. 16.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
17. 17.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) oil on a squeaky hinge (d) powder on a carrom board
18. 18.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
19. 19.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, sandpaper 6 N, ice 1 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
21. 21.True or false: a tyre with deep treads gives more friction. (a) False (b) True
22. 22.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
23. 23.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
24. 24.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
25. 25.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wet tiled floor (c) a grippy rubber sole (d) chalk on a gym bar
26. 26.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a smooth steel slide (d) a rough doormat
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N, sandpaper 10 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 4 N, a glass sheet 7 N, a wooden plank 10 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
29. 29.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
30. 30.True or false: powder on a carrom board gives less friction. (a) False (b) True
31. 31.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
32. 32.True or false: a smooth steel slide gives more friction. (a) False (b) True
33. 33.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
34. 34.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
35. 35.🛞 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 wooden plank 9 N, a carpet 12 N. How many newtons more were needed on a carpet than on ice?
36. 36.🛞 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 9 N, a carpet 11 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 8 N, sandpaper 11 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
38. 38.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
39. 39.True or false: powder on a carrom board gives more friction. (a) True (b) False
40. 40.True or false: a rough doormat gives less friction. (a) True (b) False

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