Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 619 · 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.🔍 Which is the odd one out? (a) a rough doormat (b) powder on a carrom board (c) a smooth steel slide (d) skating on ice
2. 2.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
3. 3.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 7 N, a carpet 10 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on ice?
5. 5.🛞 Friction acts … (a) against the motion (b) only on ice (c) with the motion (d) only upwards
6. 6.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 2 N, a wooden plank 6 N, a carpet 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
8. 8.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
9. 9.True or false: sand on a slippery path gives more friction. (a) False (b) True
10. 10.🛞 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 11 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a carpet (c) sandpaper (d) a wooden plank
11. 11.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a glass sheet 5 N, a carpet 7 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 2 N, a carpet 4 N, sandpaper 5 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 5 N, a carpet 6 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on ice?
15. 15.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
16. 16.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
17. 17.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
18. 18.True or false: skating on ice gives less friction. (a) False (b) True
19. 19.🛞 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 6 N. How many newtons more were needed on sandpaper than on ice?
20. 20.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
21. 21.🛞 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, a carpet 11 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
22. 22.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) cold (d) wet
23. 23.True or false: a wet tiled floor gives less friction. (a) True (b) False
24. 24.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
25. 25.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) powder on a carrom board (d) a box pushed on carpet
27. 27.🛞 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, a glass sheet 2 N. How many newtons more were needed on sandpaper than on a glass sheet?
28. 28.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) polished marble (d) glass
29. 29.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) skating on ice (d) a box pushed on carpet
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 5 N, sandpaper 7 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
32. 32.True or false: skating on ice gives more friction. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a wheel on ball bearings (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 glass sheet 2 N, a wooden plank 4 N, a carpet 8 N, sandpaper 12 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, ice 3 N, a glass sheet 6 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 11 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
37. 37.🔍 Which is the odd one out? (a) a box pushed on carpet (b) chalk on a gym bar (c) a rough doormat (d) a smooth steel slide
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N, sandpaper 5 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
40. 40.True or false: powder on a carrom board gives more friction. (a) False (b) True

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