Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 106 · 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.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a rough doormat (c) sand on a slippery path (d) oil on a squeaky hinge
2. 2.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
3. 3.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
4. 4.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) wet (d) cold
5. 5.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
6. 6.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
7. 7.True or false: a tyre with deep treads gives less friction. (a) True (b) False
8. 8.True or false: a smooth steel slide gives less friction. (a) False (b) True
9. 9.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
10. 10.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
11. 11.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
12. 12.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
13. 13.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
14. 14.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wet tiled floor (c) skating on ice (d) oil on a squeaky hinge
15. 15.True or false: chalk on a gym bar gives less friction. (a) False (b) True
16. 16.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
17. 17.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
19. 19.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
20. 20.True or false: a grippy rubber sole gives more friction. (a) False (b) True
21. 21.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
22. 22.🔍 Which is the odd one out? (a) powder on a carrom board (b) sand on a slippery path (c) a tyre with deep treads (d) a box pushed on carpet
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 6 N, sandpaper 9 N, ice 2 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) ice
24. 24.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) a grippy rubber sole (d) skating on ice
25. 25.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a box pushed on carpet (c) sand on a slippery path (d) a wet tiled floor
26. 26.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
27. 27.🔍 Which is the odd one out? (a) sand on a slippery path (b) a rough doormat (c) a wheel on ball bearings (d) chalk on a gym bar
28. 28.True or false: a rough doormat gives more friction. (a) False (b) True
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 5 N, a carpet 7 N, sandpaper 8 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a wooden plank
30. 30.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
31. 31.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) skating on ice (d) powder on a carrom board
32. 32.🛞 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 14 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
33. 33.True or false: powder on a carrom board gives less friction. (a) True (b) False
34. 34.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
35. 35.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to look nice (c) to go slower (d) to grip the road
36. 36.True or false: sand on a slippery path gives more friction. (a) True (b) False
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, ice 1 N, a glass sheet 4 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
38. 38.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) chalk on a gym bar (d) a smooth steel slide
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 6 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
40. 40.True or false: a box pushed on carpet gives less friction. (a) False (b) True

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