Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 428 · 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) helpful (b) a problem
2. 2.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) cold (d) wet
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a carpet 7 N, sandpaper 10 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
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, a carpet 13 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
6. 6.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
7. 7.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) chalk on a gym bar (d) a wet tiled floor
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, ice 1 N, a glass sheet 2 N, a wooden plank 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
9. 9.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 2 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on a carpet than on ice?
11. 11.🛞 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, ice 2 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
12. 12.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
13. 13.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) add sand (d) press parts harder
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 3 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a glass sheet 2 N, a carpet 5 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
17. 17.True or false: powder on a carrom board 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: sandpaper 9 N, ice 2 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
19. 19.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
20. 20.🛞 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 5 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on ice?
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 3 N, a glass sheet 7 N, a carpet 9 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a carpet (d) sandpaper
22. 22.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 10 N, a glass sheet 2 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
24. 24.True or false: sand on a slippery path gives less friction. (a) False (b) True
25. 25.🛞 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 3 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
26. 26.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to grip the road (d) to save rubber
27. 27.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 8 N, a carpet 12 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 7 N, sandpaper 9 N, a glass sheet 3 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 9 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on a glass sheet?
31. 31.True or false: a grippy rubber sole gives less friction. (a) False (b) True
32. 32.🛞 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, ice 3 N, a glass sheet 4 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, ice 4 N, a wooden plank 7 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) ice (d) a wooden plank
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 7 N, sandpaper 10 N, ice 2 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a wooden plank (d) a glass sheet
35. 35.True or false: a wet tiled floor gives more friction. (a) True (b) False
36. 36.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
37. 37.🛞 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 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 7 N, sandpaper 9 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, ice 2 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a wooden plank
40. 40.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem

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