Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 57 · 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.True or false: a tyre with deep treads gives more friction. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) oil on a squeaky hinge (d) a rough doormat
3. 3.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
4. 4.🛞 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 2 N, a glass sheet 6 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a glass sheet (d) sandpaper
5. 5.True or false: powder on a carrom board gives less friction. (a) False (b) True
6. 6.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 4 N, a wooden plank 6 N, a carpet 8 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 7 N, ice 1 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
9. 9.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
10. 10.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wheel on ball bearings (c) oil on a squeaky hinge (d) chalk on a gym bar
11. 11.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) make parts rough (d) press parts harder
12. 12.🛞 Rubbing your hands fast makes them … (a) warm (b) wet (c) cold (d) magnetic
13. 13.🔍 Which is the odd one out? (a) a grippy rubber sole (b) powder on a carrom board (c) skating on ice (d) a smooth steel slide
14. 14.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
15. 15.True or false: a grippy rubber sole gives more friction. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) a tyre with deep treads (d) skating on ice
17. 17.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) sandpaper (d) ice
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 12 N, a glass sheet 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
19. 19.🛞 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. Which surface gave the least friction? (a) a carpet (b) ice (c) a glass sheet (d) sandpaper
20. 20.True or false: sand on a slippery path gives less friction. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) skating on ice (d) a smooth steel slide
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 4 N, sandpaper 7 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) ice
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 7 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
24. 24.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
25. 25.True or false: skating on ice gives more friction. (a) True (b) False
26. 26.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
27. 27.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 12 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
29. 29.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
30. 30.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
31. 31.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
32. 32.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) sand on a slippery path (d) a grippy rubber sole
33. 33.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
34. 34.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
35. 35.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a grippy rubber sole (d) powder on a carrom board
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 1 N, a glass sheet 2 N, a wooden plank 6 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
37. 37.🔍 Which is the odd one out? (a) a box pushed on carpet (b) sand on a slippery path (c) a grippy rubber sole (d) a wheel on ball bearings
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on a carpet than on ice?
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 6 N, sandpaper 7 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
40. 40.True or false: a smooth steel slide gives more friction. (a) True (b) False

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