Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 84 · 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: a grippy rubber sole? (a) more friction (b) less friction
2. 2.🛞 More or less friction: powder on a carrom board? (a) less friction (b) more friction
3. 3.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 3 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
5. 5.🛞 Is friction helpful or a problem here: walking without slipping? (a) a problem (b) helpful
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 11 N, a glass sheet 1 N, a wooden plank 5 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
7. 7.🛞 Why are tyres made with deep treads? (a) to look nice (b) to go slower (c) to grip the road (d) to save rubber
8. 8.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a rough doormat (d) a wet tiled floor
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a carpet 5 N, sandpaper 7 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) ice (d) a carpet
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 9 N, sandpaper 10 N, a glass sheet 2 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
11. 11.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 8 N, ice 1 N, a wooden plank 3 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
13. 13.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 10 N, ice 4 N, a glass sheet 5 N. How many newtons more were needed on a carpet than on ice?
14. 14.🛞 More or less friction: oil on a squeaky hinge? (a) less friction (b) more friction
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a carpet 8 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
16. 16.🛞 Is friction helpful or a problem here: tyres wearing down? (a) a problem (b) helpful
17. 17.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
18. 18.🛞 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 9 N, ice 2 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
19. 19.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
20. 20.🔍 Which is the odd one out? (a) skating on ice (b) powder on a carrom board (c) chalk on a gym bar (d) a wet tiled floor
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 9 N, ice 1 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a glass sheet (c) a carpet (d) ice
22. 22.True or false: a grippy rubber sole gives less friction. (a) False (b) True
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 6 N, a wooden plank 9 N, a carpet 12 N. How many newtons more were needed on a carpet than on ice?
24. 24.🔍 Which is the odd one out? (a) skating on ice (b) a smooth steel slide (c) sand on a slippery path (d) a wheel on ball bearings
25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 1 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) a glass sheet (d) a carpet
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 3 N, a glass sheet 7 N, a wooden plank 10 N. How many newtons more were needed on a carpet than on ice?
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 7 N, a carpet 11 N, sandpaper 12 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) sandpaper
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, ice 1 N, a glass sheet 3 N, a wooden plank 5 N. Which surface gave the least friction? (a) a wooden plank (b) ice (c) a glass sheet (d) a carpet
29. 29.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) sand on a slippery path (d) oil on a squeaky hinge
30. 30.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a rough doormat (c) a grippy rubber sole (d) a box pushed on carpet
31. 31.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
32. 32.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
33. 33.🛞 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, sandpaper 14 N, ice 4 N. How many newtons more were needed on sandpaper than on ice?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, a glass sheet 3 N, a wooden plank 7 N, a carpet 11 N. How many newtons more were needed on sandpaper than on a glass sheet?
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 9 N. How many newtons more were needed on a carpet than on ice?
36. 36.🔍 Which is the odd one out? (a) sand on a slippery path (b) a tyre with deep treads (c) chalk on a gym bar (d) powder on a carrom board
37. 37.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
38. 38.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
39. 39.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) oil on a squeaky hinge (d) powder on a carrom board
40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 5 N, ice 1 N, a glass sheet 3 N. How many newtons more were needed on sandpaper than on ice?

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