Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 363 · 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 box pushed on carpet? (a) less friction (b) more friction
2. 2.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on a glass sheet?
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 11 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
5. 5.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
6. 6.🔍 Which is the odd one out? (a) chalk on a gym bar (b) oil on a squeaky hinge (c) skating on ice (d) powder on a carrom board
7. 7.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
8. 8.True or false: chalk on a gym bar gives more friction. (a) False (b) True
9. 9.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) sandpaper (d) glass
10. 10.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
11. 11.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
12. 12.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a tyre with deep treads (c) a rough doormat (d) oil on a squeaky hinge
13. 13.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 2 N, a wooden plank 5 N, sandpaper 8 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
15. 15.True or false: chalk on a gym bar gives less friction. (a) False (b) True
16. 16.True or false: a smooth steel slide gives more friction. (a) True (b) False
17. 17.True or false: a smooth steel slide gives less friction. (a) True (b) False
18. 18.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
19. 19.🔍 Which is the odd one out? (a) sand on a slippery path (b) a smooth steel slide (c) a wet tiled floor (d) skating on ice
20. 20.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
21. 21.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
22. 22.🛞 Rubbing your hands fast makes them … (a) warm (b) magnetic (c) cold (d) wet
23. 23.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) skating on ice (c) a tyre with deep treads (d) a wet tiled floor
24. 24.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
25. 25.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a rough doormat (c) sand on a slippery path (d) a smooth steel slide
26. 26.True or false: a wet tiled floor gives more friction. (a) True (b) False
27. 27.True or false: a rough doormat gives more friction. (a) False (b) True
28. 28.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
29. 29.True or false: a tyre with deep treads gives less friction. (a) False (b) True
30. 30.🛞 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) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, ice 1 N, a wooden plank 3 N. How many newtons more were needed on sandpaper than on ice?
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 4 N, a wooden plank 5 N, a carpet 7 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
33. 33.🛞 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 9 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on ice?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a glass sheet 5 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a glass sheet 8 N, a wooden plank 11 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
38. 38.True or false: sand on a slippery path gives more friction. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a wet tiled floor (b) a rough doormat (c) oil on a squeaky hinge (d) powder on a carrom board
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 1 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet

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