Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 900 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 2 N, a glass sheet 3 N, a carpet 4 N. How many newtons more were needed on sandpaper than on ice?
2. 2.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
3. 3.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 7 N, sandpaper 8 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) ice
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 7 N, sandpaper 8 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
6. 6.🛞 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, sandpaper 12 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet
7. 7.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
8. 8.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
9. 9.🛞 More or less friction: powder on a carrom board? (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 glass sheet 7 N, a wooden plank 10 N, sandpaper 13 N, ice 4 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
11. 11.True or false: sand on a slippery path gives less friction. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) powder on a carrom board (d) chalk on a gym bar
13. 13.🛞 How can we reduce friction in a machine? (a) make parts rough (b) press parts harder (c) add sand (d) oil the moving parts
14. 14.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to grip the road (d) to go slower
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 9 N, sandpaper 10 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
16. 16.True or false: skating on ice gives less friction. (a) True (b) False
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a carpet 5 N, sandpaper 6 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
18. 18.True or false: a box pushed on carpet gives more friction. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a tyre with deep treads (b) oil on a squeaky hinge (c) sand on a slippery path (d) a grippy rubber sole
20. 20.🛞 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 wooden plank 4 N, a carpet 5 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
21. 21.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
22. 22.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, a carpet 9 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, sandpaper 9 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
25. 25.True or false: powder on a carrom board gives more friction. (a) True (b) False
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a carpet 8 N, sandpaper 9 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 5 N, sandpaper 7 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a glass sheet (d) sandpaper
28. 28.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
29. 29.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
30. 30.🛞 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 5 N. How many newtons more were needed on sandpaper than on ice?
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a wooden plank 8 N, a carpet 12 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, ice 4 N, a wooden plank 7 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
33. 33.🔍 Which is the odd one out? (a) powder on a carrom board (b) skating on ice (c) a tyre with deep treads (d) a wet tiled floor
34. 34.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
35. 35.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) glass (c) ice (d) sandpaper
36. 36.True or false: a smooth steel slide gives more friction. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a grippy rubber sole (b) skating on ice (c) oil on a squeaky hinge (d) a wheel on ball bearings
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 4 N, a wooden plank 5 N, a carpet 6 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
39. 39.🛞 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 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
40. 40.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a rough doormat (c) a smooth steel slide (d) chalk on a gym bar

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