Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 944 · 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 glass sheet 4 N, a wooden plank 6 N, sandpaper 8 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
2. 2.True or false: skating on ice gives more friction. (a) False (b) True
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) sandpaper
4. 4.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) a smooth steel slide (d) chalk on a gym bar
6. 6.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
7. 7.🛞 How can we reduce friction in a machine? (a) make parts rough (b) oil the moving parts (c) add sand (d) press parts harder
8. 8.True or false: a smooth steel slide gives more friction. (a) False (b) True
9. 9.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
10. 10.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a wet tiled floor (d) a rough doormat
11. 11.True or false: chalk on a gym bar gives less friction. (a) False (b) True
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 4 N, a wooden plank 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
13. 13.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
14. 14.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
15. 15.🔍 Which is the odd one out? (a) skating on ice (b) a tyre with deep treads (c) a grippy rubber sole (d) sand on a slippery path
16. 16.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
17. 17.🛞 Friction acts … (a) only upwards (b) against the motion (c) with the motion (d) only on ice
18. 18.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
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 rough doormat
20. 20.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 3 N, sandpaper 4 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
22. 22.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
23. 23.🔍 Which is the odd one out? (a) sand on a slippery path (b) a box pushed on carpet (c) powder on a carrom board (d) chalk on a gym bar
24. 24.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
25. 25.True or false: a rough doormat gives less friction. (a) False (b) True
26. 26.True or false: a grippy rubber sole gives less friction. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) sand on a slippery path (b) skating on ice (c) a smooth steel slide (d) a wheel on ball bearings
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 10 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) a carpet
29. 29.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) cold (d) warm
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, ice 1 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
31. 31.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
32. 32.🔍 Which is the odd one out? (a) sand on a slippery path (b) a wheel on ball bearings (c) a box pushed on carpet (d) a grippy rubber sole
33. 33.True or false: a tyre with deep treads gives more friction. (a) True (b) False
34. 34.True or false: skating on ice gives less friction. (a) False (b) True
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 4 N, a glass sheet 6 N, a wooden plank 8 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
36. 36.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) a wet tiled floor (d) skating on ice
37. 37.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
38. 38.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 13 N, ice 4 N, a glass sheet 6 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
40. 40.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) a smooth steel slide (d) a grippy rubber sole

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