Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 596 · 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.🔍 Which is the odd one out? (a) a wet tiled floor (b) powder on a carrom board (c) a grippy rubber sole (d) a smooth steel slide
2. 2.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
3. 3.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 13 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
5. 5.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
6. 6.True or false: a wet tiled floor gives less friction. (a) True (b) False
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 7 N, a carpet 8 N. How many newtons more were needed on a carpet than on ice?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a glass sheet 6 N, a wooden plank 10 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 7 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
11. 11.True or false: a grippy rubber sole gives more friction. (a) True (b) False
12. 12.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
13. 13.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 11 N, a glass sheet 3 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
15. 15.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
16. 16.🛞 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 carpet 5 N, sandpaper 8 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
17. 17.True or false: a rough doormat gives more friction. (a) True (b) False
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 8 N, sandpaper 9 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) ice
19. 19.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wet tiled floor (c) powder on a carrom board (d) oil on a squeaky hinge
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 3 N, a glass sheet 4 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
21. 21.🔍 Which is the odd one out? (a) a wet tiled floor (b) a rough doormat (c) sand on a slippery path (d) a box pushed on carpet
22. 22.🛞 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 1 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 7 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
24. 24.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a carpet 10 N, sandpaper 11 N, ice 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
26. 26.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
27. 27.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 10 N, a carpet 11 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
29. 29.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 10 N, a carpet 13 N. How many newtons more were needed on a carpet than on ice?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 10 N, ice 1 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a carpet 4 N, sandpaper 7 N, ice 2 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) ice
33. 33.🔍 Which is the odd one out? (a) skating on ice (b) sand on a slippery path (c) a box pushed on carpet (d) a grippy rubber sole
34. 34.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
35. 35.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
36. 36.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a tyre with deep treads (c) chalk on a gym bar (d) a grippy rubber sole
37. 37.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) wet (d) magnetic
38. 38.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
39. 39.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
40. 40.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) oil the moving parts (d) press parts harder

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