Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 709 · 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.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
2. 2.🛞 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 9 N, ice 4 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
3. 3.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) a rough doormat (d) a grippy rubber sole
4. 4.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
5. 5.🛞 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, sandpaper 12 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
6. 6.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
7. 7.True or false: a box pushed on carpet gives more friction. (a) True (b) False
8. 8.True or false: powder on a carrom board gives more friction. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) skating on ice (d) sand on a slippery path
10. 10.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) oil on a squeaky hinge (d) a grippy rubber sole
11. 11.🛞 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 carpet 7 N, sandpaper 8 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
12. 12.🛞 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, sandpaper 13 N, a glass sheet 4 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
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 9 N, sandpaper 13 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
14. 14.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
15. 15.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 9 N, sandpaper 10 N, ice 3 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 8 N, sandpaper 10 N, a glass sheet 3 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
18. 18.🛞 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 2 N, a glass sheet 3 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 13 N, a glass sheet 2 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on a glass sheet?
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, sandpaper 9 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
22. 22.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) wet (d) magnetic
23. 23.True or false: a smooth steel slide gives more friction. (a) False (b) True
24. 24.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
25. 25.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 5 N, a carpet 9 N, sandpaper 10 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 8 N, a carpet 11 N, sandpaper 15 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
28. 28.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
29. 29.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a smooth steel slide (c) a box pushed on carpet (d) a wet tiled floor
30. 30.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
31. 31.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
32. 32.True or false: chalk on a gym bar gives less friction. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) a box pushed on carpet (d) sand on a slippery path
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) ice
35. 35.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
36. 36.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) chalk on a gym bar (d) a wet tiled floor
37. 37.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
38. 38.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 7 N, ice 1 N, a wooden plank 2 N. How many newtons more were needed on sandpaper than on ice?
40. 40.True or false: a wet tiled floor gives less friction. (a) False (b) True

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