Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 73 · 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.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) make parts rough (d) press parts harder
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 10 N, ice 4 N, a glass sheet 5 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
3. 3.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
4. 4.True or false: a box pushed on carpet gives more friction. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a smooth steel slide (c) a tyre with deep treads (d) a rough doormat
6. 6.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
7. 7.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to grip the road (d) to go slower
8. 8.🛞 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 9 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a wooden plank 5 N, a carpet 9 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) ice
10. 10.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
11. 11.True or false: skating on ice gives less friction. (a) False (b) True
12. 12.True or false: a tyre with deep treads gives more friction. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
14. 14.True or false: a wet tiled floor gives more friction. (a) True (b) False
15. 15.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 4 N, a carpet 6 N, sandpaper 10 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
17. 17.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) a wet tiled floor (d) a rough doormat
18. 18.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a grippy rubber sole (c) skating on ice (d) chalk on a gym bar
19. 19.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
20. 20.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) sandpaper (c) polished marble (d) glass
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 8 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
22. 22.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, ice 1 N, a glass sheet 3 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 11 N, sandpaper 13 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 3 N, a glass sheet 4 N, a wooden plank 8 N. How many newtons more were needed on a carpet than on ice?
26. 26.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a box pushed on carpet (c) a rough doormat (d) a grippy rubber sole
27. 27.🛞 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 5 N, a carpet 7 N. How many newtons more were needed on a carpet than on ice?
28. 28.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
29. 29.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
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 6 N, sandpaper 8 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on a glass sheet?
31. 31.🛞 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 12 N, sandpaper 15 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
32. 32.🛞 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 11 N, ice 1 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 4 N, a glass sheet 8 N, a wooden plank 12 N. How many newtons more were needed on a carpet than on ice?
34. 34.True or false: powder on a carrom board gives more friction. (a) True (b) False
35. 35.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
36. 36.True or false: a box pushed on carpet gives less friction. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) oil on a squeaky hinge (d) a wheel on ball bearings
38. 38.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
39. 39.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
40. 40.True or false: a smooth steel slide gives less friction. (a) False (b) True

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