Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 398 · 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.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
2. 2.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) chalk on a gym bar (d) oil on a squeaky hinge
3. 3.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
4. 4.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) polished marble (d) ice
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 3 N, a carpet 4 N, sandpaper 6 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
6. 6.🛞 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 7 N, a carpet 10 N. How many newtons more were needed on a carpet than on ice?
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 8 N, sandpaper 10 N, ice 3 N, a glass sheet 7 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
9. 9.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
10. 10.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) cold (d) wet
11. 11.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
12. 12.True or false: a grippy rubber sole gives less friction. (a) True (b) False
13. 13.🛞 Friction acts … (a) against the motion (b) with the motion (c) only upwards (d) only on ice
14. 14.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
15. 15.True or false: a box pushed on carpet gives more friction. (a) True (b) False
16. 16.🛞 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 2 N, a glass sheet 3 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a glass sheet 8 N, a carpet 11 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 4 N, sandpaper 5 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
19. 19.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a glass sheet 7 N, a carpet 11 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) ice (d) a carpet
21. 21.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
22. 22.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) a smooth steel slide (d) sand on a slippery path
23. 23.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
24. 24.True or false: a smooth steel slide gives more friction. (a) False (b) True
25. 25.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
26. 26.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to look nice (d) to go slower
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 7 N, sandpaper 10 N, ice 2 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
28. 28.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
29. 29.🛞 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 10 N, a glass sheet 4 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
30. 30.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
31. 31.True or false: chalk on a gym bar gives less friction. (a) False (b) True
32. 32.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 16 N, ice 4 N, a glass sheet 8 N, a wooden plank 12 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
34. 34.True or false: skating on ice gives less friction. (a) False (b) True
35. 35.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 13 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
37. 37.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
38. 38.🛞 How can we reduce friction in a machine? (a) make parts rough (b) add sand (c) oil the moving parts (d) press parts harder
39. 39.True or false: sand on a slippery path gives more friction. (a) False (b) True
40. 40.True or false: chalk on a gym bar gives more friction. (a) True (b) False

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