Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 160 · 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.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
2. 2.True or false: a smooth steel slide gives less friction. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a wheel on ball bearings (c) oil on a squeaky hinge (d) powder on a carrom board
4. 4.True or false: a rough doormat gives more friction. (a) True (b) False
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 7 N, a wooden plank 8 N, a carpet 9 N. Which surface gave the least friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) ice
6. 6.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
7. 7.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
8. 8.🛞 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 8 N, sandpaper 10 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) a wooden plank (d) ice
9. 9.True or false: sand on a slippery path gives more friction. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) chalk on a gym bar
11. 11.🛞 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 10 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a carpet (c) ice (d) sandpaper
12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, ice 4 N, a glass sheet 6 N. Which surface gave the most friction? (a) sandpaper (b) a glass sheet (c) ice (d) a carpet
13. 13.True or false: oil on a squeaky hinge gives less friction. (a) False (b) True
14. 14.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
15. 15.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a carpet 5 N, sandpaper 8 N, ice 3 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) sandpaper
16. 16.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
17. 17.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, ice 3 N, a wooden plank 5 N, a carpet 7 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
18. 18.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) ice (c) polished marble (d) glass
19. 19.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
20. 20.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 4 N, sandpaper 6 N, a glass sheet 1 N, a wooden plank 2 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) a wooden plank (d) sandpaper
21. 21.🛞 Friction acts … (a) against the motion (b) with the motion (c) only on ice (d) only upwards
22. 22.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
23. 23.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) a grippy rubber sole (d) a wet tiled floor
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 8 N, sandpaper 9 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
25. 25.🛞 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 9 N. Which surface gave the least friction? (a) a carpet (b) ice (c) sandpaper (d) a glass sheet
26. 26.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
27. 27.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
28. 28.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, sandpaper 14 N, a glass sheet 4 N, a wooden plank 8 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) sandpaper
30. 30.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 8 N, a glass sheet 1 N, a wooden plank 3 N, a carpet 4 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
32. 32.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a box pushed on carpet
33. 33.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
34. 34.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
35. 35.🛞 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 8 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
36. 36.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
37. 37.🛞 More or less friction: a grippy rubber sole? (a) more friction (b) less friction
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, ice 3 N, a glass sheet 4 N, a carpet 8 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a carpet
39. 39.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) a rough doormat (d) a wheel on ball bearings
40. 40.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem

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