Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 811 · 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: a wooden plank 7 N, sandpaper 8 N, ice 3 N, a glass sheet 5 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 4 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?
3. 3.True or false: a box pushed on carpet gives less friction. (a) False (b) True
4. 4.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
5. 5.🛞 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 11 N, sandpaper 12 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
6. 6.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
7. 7.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
8. 8.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
9. 9.True or false: a tyre with deep treads gives less friction. (a) True (b) False
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 10 N, sandpaper 14 N, ice 3 N, a glass sheet 6 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) sandpaper
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 2 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
12. 12.True or false: a wet tiled floor gives more friction. (a) True (b) False
13. 13.🛞 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 carpet (b) sandpaper (c) a glass sheet (d) ice
14. 14.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 11 N, ice 3 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
16. 16.🛞 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 10 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
17. 17.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass
18. 18.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
19. 19.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a smooth steel slide (c) a grippy rubber sole (d) powder on a carrom board
20. 20.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 5 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, a carpet 10 N, ice 4 N. How many newtons more were needed on a carpet than on ice?
23. 23.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) a tyre with deep treads (d) a box pushed on carpet
24. 24.🛞 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 4 N, sandpaper 5 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a glass sheet
25. 25.🛞 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 11 N, sandpaper 15 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
26. 26.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
27. 27.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
28. 28.🛞 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 3 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 11 N, a carpet 14 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) a wooden plank
30. 30.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
31. 31.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) cold (d) magnetic
32. 32.🛞 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 least friction? (a) a wooden plank (b) sandpaper (c) ice (d) a glass sheet
33. 33.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
34. 34.True or false: powder on a carrom board gives less friction. (a) True (b) False
35. 35.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
36. 36.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a wooden plank 8 N, a carpet 12 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) ice
38. 38.True or false: a rough doormat gives more friction. (a) False (b) True
39. 39.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
40. 40.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True

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