Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 323 · 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: a wooden plank 10 N, a carpet 13 N, ice 4 N, a glass sheet 6 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
2. 2.🛞 How can we reduce friction in a machine? (a) add sand (b) press parts harder (c) make parts rough (d) oil the moving parts
3. 3.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, a glass sheet 2 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
6. 6.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) a grippy rubber sole (d) a smooth steel slide
7. 7.🛞 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 carpet 5 N, sandpaper 7 N. How many newtons more were needed on sandpaper than on ice?
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 4 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on ice?
9. 9.True or false: a smooth steel slide gives less friction. (a) True (b) False
10. 10.True or false: chalk on a gym bar gives more friction. (a) False (b) True
11. 11.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
12. 12.🔍 Which is the odd one out? (a) powder on a carrom board (b) a rough doormat (c) a smooth steel slide (d) oil on a squeaky hinge
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 7 N, sandpaper 10 N, ice 4 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) ice (d) a glass sheet
14. 14.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
15. 15.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
16. 16.True or false: a smooth steel slide gives more friction. (a) False (b) True
17. 17.True or false: chalk on a gym bar gives less friction. (a) True (b) False
18. 18.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, ice 1 N, a glass sheet 3 N, a carpet 5 N. How many newtons more were needed on sandpaper than on ice?
20. 20.🛞 Friction acts … (a) only upwards (b) with the motion (c) only on ice (d) against the motion
21. 21.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
22. 22.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 11 N, sandpaper 14 N, ice 4 N, a glass sheet 7 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
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 carpet 6 N, sandpaper 7 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) ice
25. 25.🔍 Which is the odd one out? (a) powder on a carrom board (b) a box pushed on carpet (c) a wet tiled floor (d) a wheel on ball bearings
26. 26.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
27. 27.True or false: a tyre with deep treads gives less friction. (a) True (b) False
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 10 N, ice 3 N, a glass sheet 4 N, a carpet 7 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a wooden plank 5 N, a carpet 6 N, sandpaper 7 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) sandpaper (d) a carpet
30. 30.True or false: sand on a slippery path gives less friction. (a) False (b) True
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 5 N, sandpaper 7 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
32. 32.True or false: powder on a carrom board gives more friction. (a) True (b) False
33. 33.True or false: skating on ice gives less friction. (a) False (b) True
34. 34.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
35. 35.🛞 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 6 N, a carpet 8 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) ice (d) a glass sheet
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 8 N, ice 2 N, a glass sheet 4 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a wooden plank (d) a carpet
37. 37.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
38. 38.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a smooth steel slide (d) chalk on a gym bar
39. 39.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) a wheel on ball bearings (d) a rough doormat
40. 40.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem

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