Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 371 · 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 8 N, sandpaper 12 N, ice 1 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
2. 2.True or false: a tyre with deep treads gives more friction. (a) True (b) False
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 1 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
4. 4.🛞 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 6 N, sandpaper 8 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) ice
5. 5.True or false: skating on ice gives more friction. (a) False (b) True
6. 6.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
7. 7.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
8. 8.True or false: a box pushed on carpet gives less friction. (a) False (b) True
9. 9.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
10. 10.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) a rough doormat (d) skating on ice
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 2 N, a wooden plank 5 N, a carpet 8 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 9 N, a carpet 13 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
13. 13.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
14. 14.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
15. 15.🛞 How can we reduce friction in a machine? (a) add sand (b) press parts harder (c) oil the moving parts (d) make parts rough
16. 16.True or false: a grippy rubber sole gives more friction. (a) False (b) True
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 11 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
18. 18.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
19. 19.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
20. 20.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) sandpaper (d) ice
21. 21.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
22. 22.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
23. 23.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to grip the road (d) to go slower
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 4 N, a glass sheet 5 N, a carpet 6 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
25. 25.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
26. 26.True or false: powder on a carrom board gives less friction. (a) False (b) True
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 5 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
28. 28.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
29. 29.True or false: a box pushed on carpet gives more friction. (a) False (b) True
30. 30.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
31. 31.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
32. 32.True or false: a rough doormat gives more friction. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a rough doormat (b) a smooth steel slide (c) chalk on a gym bar (d) a tyre with deep treads
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: sandpaper 8 N, ice 2 N, a glass sheet 3 N, a carpet 7 N. How many newtons more were needed on sandpaper than on ice?
36. 36.True or false: a rough doormat gives less friction. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) chalk on a gym bar (b) oil on a squeaky hinge (c) a smooth steel slide (d) a wet tiled floor
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 2 N, a glass sheet 4 N, a wooden plank 6 N. How many newtons more were needed on a carpet than on ice?
39. 39.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
40. 40.🛞 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 10 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper

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