Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 701 · 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.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
2. 2.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
3. 3.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
4. 4.🛞 Why are tyres made with deep treads? (a) to go slower (b) to look nice (c) to grip the road (d) to save rubber
5. 5.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
6. 6.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
7. 7.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
8. 8.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) polished marble (c) sandpaper (d) ice
9. 9.🔍 Which is the odd one out? (a) a smooth steel slide (b) a tyre with deep treads (c) a wheel on ball bearings (d) skating on ice
10. 10.🛞 Rubbing your hands fast makes them … (a) cold (b) wet (c) magnetic (d) warm
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 9 N, sandpaper 11 N, ice 4 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) sandpaper
12. 12.🔍 Which is the odd one out? (a) skating on ice (b) a grippy rubber sole (c) oil on a squeaky hinge (d) powder on a carrom board
13. 13.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
14. 14.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
15. 15.True or false: a tyre with deep treads gives more friction. (a) False (b) True
16. 16.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 5 N, a wooden plank 9 N, a carpet 13 N. How many newtons more were needed on a carpet than on ice?
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 4 N, a glass sheet 6 N, a wooden plank 7 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a carpet (d) a glass sheet
19. 19.🛞 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 1 N, a glass sheet 3 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
20. 20.True or false: skating on ice gives more friction. (a) True (b) False
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 6 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 7 N, sandpaper 8 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) a carpet (d) sandpaper
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 1 N, a glass sheet 3 N, a carpet 7 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
24. 24.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
25. 25.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 9 N, sandpaper 10 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
28. 28.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
29. 29.🛞 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 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
30. 30.True or false: skating on ice gives less friction. (a) True (b) False
31. 31.🛞 How can we reduce friction in a machine? (a) press parts harder (b) oil the moving parts (c) make parts rough (d) add sand
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 glass sheet 4 N, a wooden plank 6 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 8 N, ice 1 N, a glass sheet 2 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
34. 34.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
35. 35.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
36. 36.🛞 Friction acts … (a) with the motion (b) only on ice (c) against the motion (d) only upwards
37. 37.True or false: a tyre with deep treads gives less friction. (a) True (b) False
38. 38.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a smooth steel slide (b) a box pushed on carpet (c) a rough doormat (d) a tyre with deep treads
40. 40.True or false: powder on a carrom board gives less friction. (a) False (b) True

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