Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 494 · 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: writing with a pencil? (a) a problem (b) helpful
2. 2.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
3. 3.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
4. 4.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 4 N, sandpaper 8 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
5. 5.🔍 Which is the odd one out? (a) a wet tiled floor (b) a rough doormat (c) chalk on a gym bar (d) a tyre with deep treads
6. 6.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
7. 7.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
8. 8.True or false: a tyre with deep treads gives more friction. (a) True (b) False
9. 9.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 3 N, a carpet 4 N, sandpaper 6 N. How many newtons more were needed on sandpaper than on ice?
11. 11.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 3 N, a carpet 7 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
13. 13.True or false: a smooth steel slide gives more friction. (a) False (b) True
14. 14.🛞 Why are tyres made with deep treads? (a) to save rubber (b) to go slower (c) to look nice (d) to grip the road
15. 15.True or false: a wet tiled floor gives more friction. (a) False (b) True
16. 16.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) glass (d) polished marble
17. 17.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) skating on ice (c) a grippy rubber sole (d) powder on a carrom board
18. 18.🔍 Which is the odd one out? (a) a box pushed on carpet (b) powder on a carrom board (c) a tyre with deep treads (d) a rough doormat
19. 19.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a box pushed on carpet (c) a rough doormat (d) skating on ice
20. 20.🔍 Which is the odd one out? (a) skating on ice (b) a wet tiled floor (c) powder on a carrom board (d) sand on a slippery path
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 6 N, sandpaper 9 N, ice 1 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) sandpaper (d) a carpet
22. 22.True or false: powder on a carrom board gives more friction. (a) False (b) True
23. 23.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) helpful (b) a problem
24. 24.🛞 Rubbing your hands fast makes them … (a) cold (b) magnetic (c) wet (d) warm
25. 25.🛞 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, a carpet 6 N, sandpaper 7 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 7 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on a glass sheet?
27. 27.True or false: a grippy rubber sole gives less friction. (a) False (b) True
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 5 N, a wooden plank 7 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) ice (d) sandpaper
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 7 N, ice 1 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
30. 30.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
31. 31.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) oil on a squeaky hinge (d) a rough doormat
32. 32.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
33. 33.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
34. 34.🛞 Friction acts … (a) only on ice (b) with the motion (c) against the motion (d) only upwards
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 11 N, ice 2 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) ice
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, a glass sheet 2 N, a wooden plank 4 N, a carpet 6 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 6 N, sandpaper 10 N, a glass sheet 1 N. How many newtons more were needed on sandpaper than on a glass sheet?
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) oil on a squeaky hinge (b) a wet tiled floor (c) a smooth steel slide (d) a rough doormat
40. 40.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful

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