Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 489 · 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: a wooden plank 5 N, a carpet 9 N, ice 2 N, a glass sheet 3 N. How many newtons more were needed on a carpet than on ice?
2. 2.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
3. 3.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) powder on a carrom board (c) sand on a slippery path (d) oil on a squeaky hinge
4. 4.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
5. 5.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
6. 6.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) glass (d) ice
7. 7.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N, a carpet 7 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
9. 9.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
10. 10.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 5 N, a carpet 8 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
12. 12.🛞 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 13 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
13. 13.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
14. 14.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a smooth steel slide (c) sand on a slippery path (d) chalk on a gym bar
15. 15.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
16. 16.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
17. 17.🛞 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, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
18. 18.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
19. 19.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a carpet 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
21. 21.True or false: a grippy rubber sole gives more friction. (a) True (b) False
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 2 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
23. 23.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
24. 24.True or false: a tyre with deep treads gives less friction. (a) False (b) True
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 10 N, sandpaper 13 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) a carpet
26. 26.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 1 N, a wooden plank 2 N, a carpet 6 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
28. 28.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a box pushed on carpet (c) a wet tiled floor (d) sand on a slippery path
29. 29.True or false: a wet tiled floor gives more friction. (a) True (b) False
30. 30.True or false: a box pushed on carpet gives more friction. (a) False (b) True
31. 31.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
32. 32.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
33. 33.True or false: a tyre with deep treads gives more friction. (a) True (b) False
34. 34.🛞 Friction acts … (a) only upwards (b) only on ice (c) with the motion (d) against the motion
35. 35.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a wooden plank 10 N, a carpet 11 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 12 N, sandpaper 13 N, ice 4 N, a glass sheet 8 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) ice
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 9 N, sandpaper 12 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a carpet 9 N, sandpaper 12 N, ice 4 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, a carpet 4 N, sandpaper 6 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank

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