Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 888 · 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: sand on a slippery path gives more friction. (a) False (b) True
2. 2.True or false: a grippy rubber sole gives more friction. (a) True (b) False
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 7 N, sandpaper 11 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
4. 4.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
5. 5.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) sandpaper (d) glass
6. 6.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) a wet tiled floor (d) oil on a squeaky hinge
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 10 N, sandpaper 12 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
9. 9.🛞 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 2 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
10. 10.True or false: a tyre with deep treads gives more friction. (a) False (b) True
11. 11.True or false: a box pushed on carpet gives more friction. (a) False (b) True
12. 12.🛞 Friction acts … (a) only on ice (b) against the motion (c) with the motion (d) only upwards
13. 13.True or false: chalk on a gym bar gives less friction. (a) False (b) True
14. 14.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 4 N, a wooden plank 6 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
16. 16.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
17. 17.True or false: a grippy rubber sole gives less friction. (a) True (b) False
18. 18.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to look nice (c) to save rubber (d) to go slower
19. 19.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
20. 20.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) skating on ice (d) a grippy rubber sole
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 2 N, a wooden plank 3 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 7 N, a carpet 10 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
23. 23.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) cold (d) wet
24. 24.True or false: chalk on a gym bar gives more friction. (a) True (b) False
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 8 N, sandpaper 9 N, ice 4 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet
26. 26.True or false: powder on a carrom board gives less friction. (a) False (b) True
27. 27.True or false: sand on a slippery path gives less friction. (a) True (b) False
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N, sandpaper 9 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
29. 29.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
30. 30.🛞 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 wooden plank 3 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) skating on ice (c) sand on a slippery path (d) a grippy rubber sole
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 10 N, sandpaper 14 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
33. 33.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a carpet 6 N, sandpaper 10 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) ice
35. 35.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
36. 36.🛞 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, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
37. 37.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
38. 38.True or false: powder on a carrom board gives more friction. (a) False (b) True
39. 39.🛞 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 5 N, a wooden plank 6 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet
40. 40.🔍 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

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