Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 393 · 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.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) sandpaper
3. 3.True or false: powder on a carrom board gives more friction. (a) True (b) False
4. 4.🛞 Friction acts … (a) only upwards (b) only on ice (c) with the motion (d) against the motion
5. 5.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
6. 6.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) chalk on a gym bar (c) a smooth steel slide (d) powder on a carrom board
8. 8.🛞 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 9 N, sandpaper 10 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
9. 9.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
10. 10.🛞 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 9 N, a glass sheet 1 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
11. 11.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
12. 12.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wet tiled floor (c) chalk on a gym bar (d) a tyre with deep treads
13. 13.True or false: a rough doormat gives less friction. (a) True (b) False
14. 14.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) wet (d) cold
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) chalk on a gym bar (b) a rough doormat (c) a grippy rubber sole (d) a wheel on ball bearings
17. 17.True or false: a tyre with deep treads gives less friction. (a) False (b) True
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 6 N, sandpaper 8 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
19. 19.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
20. 20.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) a box pushed on carpet (d) a smooth steel slide
21. 21.🔍 Which is the odd one out? (a) a smooth steel slide (b) sand on a slippery path (c) powder on a carrom board (d) oil on a squeaky hinge
22. 22.🛞 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 11 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 4 N, a carpet 8 N, sandpaper 9 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
24. 24.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
25. 25.True or false: a grippy rubber sole gives less friction. (a) False (b) True
26. 26.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, ice 4 N, a glass sheet 6 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, ice 1 N, a glass sheet 2 N, a wooden plank 3 N. How many newtons more were needed on a carpet than on ice?
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 7 N, ice 4 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
31. 31.True or false: skating on ice gives less friction. (a) True (b) False
32. 32.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
33. 33.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 13 N, ice 3 N, a glass sheet 5 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
35. 35.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to grip the road (d) to look nice
36. 36.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
37. 37.True or false: sand on a slippery path gives more friction. (a) False (b) True
38. 38.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
39. 39.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
40. 40.True or false: chalk on a gym bar gives less friction. (a) True (b) False

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