Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 176 · 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 11 N, ice 4 N, a glass sheet 5 N, a carpet 7 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
2. 2.True or false: a box pushed on carpet gives more friction. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wheel on ball bearings (c) a tyre with deep treads (d) a wet tiled floor
4. 4.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
5. 5.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
6. 6.True or false: a grippy rubber sole gives more friction. (a) False (b) True
7. 7.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
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 8 N, sandpaper 12 N, ice 1 N. Which surface gave the most friction? (a) a carpet (b) ice (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 carpet 7 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
10. 10.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
11. 11.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
12. 12.🛞 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 3 N, a carpet 4 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 8 N, sandpaper 11 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, ice 3 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 4 N, a glass sheet 5 N, a wooden plank 7 N. How many newtons more were needed on a carpet than on ice?
16. 16.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
17. 17.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) oil the moving parts (d) add sand
18. 18.🔍 Which is the odd one out? (a) a smooth steel slide (b) chalk on a gym bar (c) a box pushed on carpet (d) a tyre with deep treads
19. 19.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 8 N, a wooden plank 11 N, sandpaper 15 N, ice 4 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
21. 21.True or false: a box pushed on carpet gives less friction. (a) True (b) False
22. 22.🛞 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 5 N, a carpet 7 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
23. 23.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, sandpaper 12 N, a glass sheet 4 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) a carpet
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 11 N, ice 1 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
26. 26.True or false: skating on ice gives more friction. (a) True (b) False
27. 27.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
28. 28.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
29. 29.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 7 N, sandpaper 9 N, a glass sheet 4 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
31. 31.🔍 Which is the odd one out? (a) a wet tiled floor (b) a box pushed on carpet (c) a wheel on ball bearings (d) oil on a squeaky hinge
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 6 N, sandpaper 7 N, ice 1 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) ice (d) a carpet
33. 33.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) cold (d) magnetic
34. 34.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wheel on ball bearings (c) a tyre with deep treads (d) a grippy rubber sole
35. 35.🛞 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 8 N, sandpaper 12 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) sandpaper
36. 36.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 4 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 6 N, a carpet 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on a glass sheet?
39. 39.True or false: a grippy rubber sole gives less friction. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wet tiled floor (c) chalk on a gym bar (d) a rough doormat

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