Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 298 · 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 tyre with deep treads (b) a smooth steel slide (c) a wheel on ball bearings (d) powder on a carrom board
2. 2.True or false: a wet tiled floor gives less friction. (a) False (b) True
3. 3.True or false: powder on a carrom board gives more friction. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) powder on a carrom board (d) chalk on a gym bar
5. 5.🔍 Which is the odd one out? (a) powder on a carrom board (b) a grippy rubber sole (c) a wheel on ball bearings (d) oil on a squeaky hinge
6. 6.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
7. 7.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
9. 9.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 3 N, sandpaper 4 N, a glass sheet 1 N, a wooden plank 2 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 8 N, ice 3 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
12. 12.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) oil on a squeaky hinge (d) a grippy rubber sole
13. 13.True or false: a box pushed on carpet gives less friction. (a) False (b) True
14. 14.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
15. 15.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 6 N, sandpaper 9 N, a glass sheet 1 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
17. 17.True or false: sand on a slippery path gives more friction. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) powder on a carrom board (b) oil on a squeaky hinge (c) a box pushed on carpet (d) a smooth steel slide
19. 19.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) ice (c) sandpaper (d) polished marble
20. 20.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
21. 21.True or false: skating on ice 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: a glass sheet 8 N, a wooden plank 11 N, sandpaper 12 N, ice 4 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
23. 23.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
24. 24.True or false: chalk on a gym bar gives less friction. (a) True (b) False
25. 25.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
26. 26.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) press parts harder (d) make parts rough
27. 27.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
28. 28.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
29. 29.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
30. 30.🔍 Which is the odd one out? (a) sand on a slippery path (b) powder on a carrom board (c) skating on ice (d) a wheel on ball bearings
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 3 N, a glass sheet 6 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (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, sandpaper 11 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) ice
34. 34.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
35. 35.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
36. 36.🛞 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 8 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on a glass sheet?
37. 37.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
38. 38.🛞 Friction acts … (a) only upwards (b) against the motion (c) with the motion (d) only on ice
39. 39.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
40. 40.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem

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