Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 817 · 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.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
2. 2.True or false: chalk on a gym bar gives more friction. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) a box pushed on carpet (d) a rough doormat
4. 4.True or false: a tyre with deep treads gives less friction. (a) False (b) True
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
6. 6.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
7. 7.True or false: a tyre with deep treads gives more friction. (a) True (b) False
8. 8.True or false: a rough doormat gives more friction. (a) True (b) False
9. 9.True or false: a rough doormat gives less friction. (a) True (b) False
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 7 N, ice 2 N. Which surface gave the least friction? (a) a glass sheet (b) ice (c) a carpet (d) a wooden plank
11. 11.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) ice (d) polished marble
12. 12.True or false: a grippy rubber sole gives less friction. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 5 N, a wooden plank 8 N, sandpaper 11 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a wooden plank (d) a glass sheet
14. 14.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
15. 15.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
16. 16.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
17. 17.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
18. 18.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a wooden plank 6 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
20. 20.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) cold (d) wet
21. 21.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to go slower (d) to look nice
22. 22.True or false: chalk on a gym bar gives less friction. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) a smooth steel slide (b) a wet tiled floor (c) a tyre with deep treads (d) powder on a carrom board
24. 24.🔍 Which is the odd one out? (a) sand on a slippery path (b) oil on a squeaky hinge (c) chalk on a gym bar (d) a rough doormat
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 3 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
26. 26.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a wooden plank 4 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
28. 28.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 7 N, a carpet 9 N, sandpaper 13 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
30. 30.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, ice 3 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
32. 32.True or false: a wet tiled floor gives more friction. (a) True (b) False
33. 33.🛞 Friction acts … (a) against the motion (b) only on ice (c) with the motion (d) only upwards
34. 34.🔍 Which is the odd one out? (a) a box pushed on carpet (b) a wheel on ball bearings (c) a tyre with deep treads (d) a grippy rubber sole
35. 35.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
36. 36.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 3 N, a glass sheet 4 N, a wooden plank 6 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
38. 38.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N, sandpaper 6 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
40. 40.True or false: sand on a slippery path gives more friction. (a) False (b) True

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