Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 527 · 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.🛞 Friction acts … (a) only on ice (b) against the motion (c) with the motion (d) only upwards
2. 2.True or false: powder on a carrom board gives less friction. (a) True (b) False
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, ice 2 N, a glass sheet 4 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
4. 4.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) warm (d) magnetic
5. 5.🛞 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 13 N, ice 3 N. How many newtons more were needed on a carpet than on ice?
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 6 N, ice 2 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
7. 7.🛞 How can we reduce friction in a machine? (a) add sand (b) oil the moving parts (c) make parts rough (d) press parts harder
8. 8.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 4 N, sandpaper 6 N, a glass sheet 1 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
10. 10.True or false: chalk on a gym bar gives less friction. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a wet tiled floor (b) sand on a slippery path (c) a box pushed on carpet (d) a tyre with deep treads
12. 12.True or false: a smooth steel slide gives more friction. (a) False (b) True
13. 13.🛞 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 6 N, a carpet 7 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) ice
14. 14.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
15. 15.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a wheel on ball bearings (d) sand on a slippery path
16. 16.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) oil on a squeaky hinge (d) chalk on a gym bar
17. 17.🛞 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 glass sheet 5 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
18. 18.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, ice 4 N, a glass sheet 5 N. How many newtons more were needed on a carpet than on ice?
20. 20.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, sandpaper 6 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
22. 22.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
23. 23.True or false: powder on a carrom board gives more friction. (a) True (b) False
24. 24.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
25. 25.🛞 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 4 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) ice (d) a wooden plank
26. 26.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) sand on a slippery path
27. 27.🔍 Which is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) oil on a squeaky hinge (d) powder on a carrom board
28. 28.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
29. 29.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) ice (d) sandpaper
30. 30.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) a smooth steel slide (d) a tyre with deep treads
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, a glass sheet 1 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
32. 32.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) a grippy rubber sole (d) oil on a squeaky hinge
33. 33.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) a smooth steel slide (d) a rough doormat
34. 34.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) a box pushed on carpet (d) chalk on a gym bar
35. 35.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
36. 36.True or false: a wet tiled floor gives less friction. (a) False (b) True
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 8 N, ice 4 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: sandpaper 12 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 8 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
39. 39.🛞 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 7 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) ice (d) a carpet
40. 40.True or false: a rough doormat gives more friction. (a) False (b) True

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