Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 450 · 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.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a wooden plank 6 N, a carpet 8 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
2. 2.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a rough doormat (c) a smooth steel slide (d) a grippy rubber sole
3. 3.🛞 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 11 N, ice 3 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
4. 4.🔍 Which is the odd one out? (a) a rough doormat (b) a smooth steel slide (c) a wheel on ball bearings (d) powder on a carrom board
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 4 N, a carpet 5 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on a glass sheet?
6. 6.True or false: a wet tiled floor gives more friction. (a) True (b) False
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, ice 1 N, a glass sheet 3 N, a wooden plank 4 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) a wooden plank
8. 8.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
9. 9.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 1 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) sandpaper
11. 11.🔍 Which is the odd one out? (a) a rough doormat (b) a tyre with deep treads (c) a grippy rubber sole (d) oil on a squeaky hinge
12. 12.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) glass (d) sandpaper
13. 13.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
14. 14.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 1 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) ice
16. 16.True or false: a tyre with deep treads gives less friction. (a) False (b) True
17. 17.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
18. 18.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
19. 19.True or false: a smooth steel slide 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: a carpet 7 N, sandpaper 8 N, ice 4 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
21. 21.🔍 Which is the odd one out? (a) a box pushed on carpet (b) oil on a squeaky hinge (c) a wet tiled floor (d) skating on ice
22. 22.🛞 Friction acts … (a) against the motion (b) only on ice (c) only upwards (d) with the motion
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, ice 2 N, a glass sheet 6 N, a wooden plank 9 N. How many newtons more were needed on a carpet than on ice?
24. 24.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
25. 25.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 4 N, a wooden plank 5 N, a carpet 7 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
27. 27.True or false: a tyre with deep treads gives more friction. (a) True (b) False
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 11 N, sandpaper 12 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a wooden plank
29. 29.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
30. 30.True or false: sand on a slippery path gives more friction. (a) False (b) True
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 9 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) a carpet
32. 32.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 8 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
34. 34.True or false: skating on ice gives more friction. (a) False (b) True
35. 35.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) warm (d) magnetic
36. 36.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
37. 37.🔍 Which is the odd one out? (a) a smooth steel slide (b) skating on ice (c) oil on a squeaky hinge (d) chalk on a gym bar
38. 38.🛞 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 2 N, a wooden plank 5 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) a glass sheet
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, sandpaper 6 N, ice 3 N. How many newtons more were needed on sandpaper than on ice?
40. 40.🛞 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 4 N, a carpet 5 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet

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