Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 272 · 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: ice 4 N, a wooden plank 8 N, a carpet 10 N, sandpaper 13 N. Which surface gave the least friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
2. 2.🛞 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 7 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
3. 3.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
4. 4.🛞 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 8 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
5. 5.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 8 N, a carpet 10 N, ice 2 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
7. 7.True or false: chalk on a gym bar gives more friction. (a) True (b) False
8. 8.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, a carpet 6 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
10. 10.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to look nice (c) to go slower (d) to save rubber
11. 11.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
12. 12.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
13. 13.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 5 N, a wooden plank 6 N, a carpet 7 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
15. 15.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) sand on a slippery path (c) a smooth steel slide (d) powder on a carrom board
16. 16.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
17. 17.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) a tyre with deep treads (d) a wet tiled floor
18. 18.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) oil on a squeaky hinge (c) a grippy rubber sole (d) a wet tiled floor
19. 19.🛞 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 2 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
20. 20.🛞 How can we reduce friction in a machine? (a) press parts harder (b) make parts rough (c) add sand (d) oil the moving parts
21. 21.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
22. 22.🔍 Which is the odd one out? (a) powder on a carrom board (b) a rough doormat (c) sand on a slippery path (d) chalk on a gym bar
23. 23.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
24. 24.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) a box pushed on carpet (d) oil on a squeaky hinge
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 1 N, a glass sheet 5 N, a wooden plank 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a wooden plank
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a wooden plank 5 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 11 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
29. 29.🛞 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 wooden plank 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a wooden plank 8 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 13 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
32. 32.🛞 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 12 N, a glass sheet 3 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) a wooden plank
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, ice 4 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
34. 34.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 2 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
36. 36.True or false: a box pushed on carpet gives less friction. (a) False (b) True
37. 37.True or false: a wet tiled floor gives less friction. (a) True (b) False
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a wooden plank (d) sandpaper
39. 39.🛞 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 8 N, sandpaper 11 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, ice 2 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice

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