Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 908 · 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 glass sheet 2 N, a carpet 3 N, sandpaper 7 N, ice 1 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, sandpaper 12 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
3. 3.🔍 Which is the odd one out? (a) powder on a carrom board (b) a box pushed on carpet (c) a wet tiled floor (d) a smooth steel slide
4. 4.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
5. 5.🛞 Why are tyres made with deep treads? (a) to look nice (b) to save rubber (c) to go slower (d) to grip the road
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 2 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
7. 7.True or false: a wet tiled floor gives more friction. (a) False (b) True
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a carpet 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
9. 9.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
10. 10.🛞 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 carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
11. 11.True or false: a tyre with deep treads gives more friction. (a) False (b) True
12. 12.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
13. 13.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a wooden plank 4 N, sandpaper 7 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) sandpaper
15. 15.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
16. 16.True or false: powder on a carrom board 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: sandpaper 11 N, ice 3 N, a glass sheet 6 N, a wooden plank 8 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
18. 18.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
19. 19.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
20. 20.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
21. 21.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) powder on a carrom board (d) a tyre with deep treads
22. 22.True or false: skating on ice gives more friction. (a) True (b) False
23. 23.🛞 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 wooden plank 8 N, a carpet 9 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
24. 24.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 5 N, a wooden plank 9 N. How many newtons more were needed on sandpaper than on ice?
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 5 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
27. 27.True or false: a smooth steel slide gives less friction. (a) False (b) True
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 7 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?
29. 29.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
30. 30.🛞 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 6 N, sandpaper 10 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
32. 32.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
33. 33.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a grippy rubber sole
34. 34.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
35. 35.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a rough doormat (c) a smooth steel slide (d) chalk on a gym bar
36. 36.True or false: chalk on a gym bar gives more friction. (a) True (b) False
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 4 N, a wooden plank 6 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
38. 38.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
39. 39.🛞 More or less friction: oil on a squeaky hinge? (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 glass sheet 5 N, a wooden plank 7 N, a carpet 9 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet

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