Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 244 · 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.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
2. 2.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, a glass sheet 1 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) a glass sheet (d) sandpaper
4. 4.🔍 Which is the odd one out? (a) chalk on a gym bar (b) powder on a carrom board (c) a wheel on ball bearings (d) skating on ice
5. 5.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
6. 6.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) powder on a carrom board (d) a box pushed on carpet
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 12 N, ice 3 N, a glass sheet 5 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a glass sheet 5 N, a wooden plank 8 N. Which surface gave the most friction? (a) a wooden plank (b) sandpaper (c) a glass sheet (d) ice
9. 9.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a wet tiled floor (c) a grippy rubber sole (d) a wheel on ball bearings
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 wooden plank 2 N, a carpet 4 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
11. 11.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
12. 12.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
13. 13.🛞 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 11 N, ice 2 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
14. 14.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 1 N, a wooden plank 2 N, a carpet 5 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a tyre with deep treads (c) a smooth steel slide (d) a rough doormat
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 5 N, a carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
18. 18.True or false: a tyre with deep treads gives less friction. (a) False (b) True
19. 19.True or false: a rough doormat gives more friction. (a) False (b) True
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 9 N, a carpet 13 N, ice 3 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) ice
21. 21.🛞 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 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
22. 22.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
23. 23.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to grip the road (c) to go slower (d) to look nice
24. 24.🛞 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 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 8 N, a glass sheet 2 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) sandpaper (d) a glass sheet
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 7 N, a carpet 10 N, ice 3 N. How many newtons more were needed on a carpet than on ice?
27. 27.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) powder on a carrom board (c) a box pushed on carpet (d) a smooth steel slide
28. 28.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
29. 29.True or false: a grippy rubber sole gives more friction. (a) False (b) True
30. 30.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, ice 1 N, a wooden plank 2 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 4 N, a wooden plank 8 N, a carpet 9 N. How many newtons more were needed on sandpaper than on ice?
32. 32.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
33. 33.True or false: a rough doormat gives less friction. (a) True (b) False
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 1 N, a wooden plank 3 N, a carpet 6 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) ice
35. 35.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) a tyre with deep treads (d) skating on ice
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, ice 1 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on ice?
37. 37.True or false: chalk on a gym bar gives more friction. (a) False (b) True
38. 38.🛞 More or less friction: sand on a slippery path? (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 6 N, a wooden plank 8 N, sandpaper 11 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
40. 40.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) add sand (d) press parts harder

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