Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 915 · 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: skating on ice? (a) less friction (b) more friction
3. 3.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a box pushed on carpet (c) chalk on a gym bar (d) a tyre with deep treads
4. 4.🛞 How can we reduce friction in a machine? (a) press parts harder (b) oil the moving parts (c) add sand (d) make parts rough
5. 5.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
6. 6.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
7. 7.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
8. 8.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
9. 9.🔍 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 smooth steel slide
10. 10.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) oil on a squeaky hinge (d) sand on a slippery path
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a wooden plank 6 N, a carpet 7 N, ice 1 N. How many newtons more were needed on a carpet than on ice?
12. 12.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
13. 13.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) a wet tiled floor (d) a rough doormat
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
15. 15.True or false: a smooth steel slide gives less friction. (a) True (b) False
16. 16.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
17. 17.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
18. 18.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
19. 19.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
20. 20.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
21. 21.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 9 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
23. 23.🛞 Rubbing your hands fast makes them … (a) wet (b) warm (c) magnetic (d) cold
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 5 N, a carpet 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
26. 26.True or false: a grippy rubber sole gives more friction. (a) False (b) True
27. 27.🛞 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 4 N, a carpet 5 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
28. 28.🛞 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, ice 2 N. Which surface gave the most friction? (a) a carpet (b) ice (c) sandpaper (d) a wooden plank
29. 29.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
30. 30.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
31. 31.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a smooth steel slide (c) oil on a squeaky hinge (d) skating on ice
32. 32.🛞 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 5 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a wooden plank
33. 33.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
34. 34.True or false: a box pushed on carpet gives more friction. (a) True (b) False
35. 35.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
36. 36.🔍 Which is the odd one out? (a) sand on a slippery path (b) chalk on a gym bar (c) a box pushed on carpet (d) a smooth steel slide
37. 37.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 4 N, a wooden plank 6 N, a carpet 8 N. How many newtons more were needed on sandpaper than on ice?
39. 39.🛞 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 carpet 5 N, sandpaper 8 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a glass sheet
40. 40.True or false: a wet tiled floor gives more friction. (a) True (b) False

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