Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 295 · 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: dragging a heavy box? (a) helpful (b) a problem
2. 2.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
3. 3.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
4. 4.🔍 Which is the odd one out? (a) a grippy rubber sole (b) chalk on a gym bar (c) a smooth steel slide (d) a rough doormat
5. 5.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
6. 6.🛞 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 carpet 8 N, sandpaper 11 N. Which surface gave the least friction? (a) ice (b) a carpet (c) sandpaper (d) a glass sheet
7. 7.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 1 N, a glass sheet 2 N, a carpet 6 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
9. 9.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
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 9 N, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
11. 11.True or false: sand on a slippery path gives less friction. (a) True (b) False
12. 12.True or false: skating on ice gives more friction. (a) False (b) True
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 10 N, ice 4 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on ice?
14. 14.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
15. 15.🛞 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 5 N, a wooden plank 8 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
16. 16.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
17. 17.True or false: a tyre with deep treads gives less friction. (a) False (b) True
18. 18.🛞 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, sandpaper 8 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) polished marble (c) glass (d) ice
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 7 N, a carpet 9 N, sandpaper 13 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
21. 21.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
22. 22.🔍 Which is the odd one out? (a) a box pushed on carpet (b) oil on a squeaky hinge (c) powder on a carrom board (d) a wheel on ball bearings
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a glass sheet
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 12 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
25. 25.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
26. 26.True or false: a smooth steel slide gives less friction. (a) False (b) True
27. 27.🛞 Rubbing your hands fast makes them … (a) warm (b) cold (c) magnetic (d) wet
28. 28.True or false: chalk on a gym bar gives more friction. (a) True (b) False
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, ice 3 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
30. 30.True or false: chalk on a gym bar gives less friction. (a) True (b) False
31. 31.True or false: a smooth steel slide gives more friction. (a) True (b) False
32. 32.🛞 Friction acts … (a) only on ice (b) only upwards (c) with the motion (d) against the motion
33. 33.🛞 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 carpet 9 N, sandpaper 11 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
34. 34.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) chalk on a gym bar (d) skating on ice
35. 35.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) add sand (c) press parts harder (d) make parts rough
36. 36.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wet tiled floor (c) chalk on a gym bar (d) a grippy rubber sole
37. 37.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
38. 38.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) a box pushed on carpet (d) oil on a squeaky hinge
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 12 N, a carpet 13 N, ice 4 N, a glass sheet 8 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
40. 40.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a wheel on ball bearings (c) a wet tiled floor (d) a smooth steel slide

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