Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 74 · 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.🛞 Rubbing your hands fast makes them … (a) magnetic (b) warm (c) wet (d) cold
2. 2.🛞 Friction acts … (a) only on ice (b) against the motion (c) only upwards (d) with the motion
3. 3.True or false: a wheel on ball bearings gives more friction. (a) True (b) False
4. 4.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
5. 5.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
6. 6.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
7. 7.🛞 Is friction helpful or a problem here: machine parts heating up? (a) a problem (b) helpful
8. 8.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
9. 9.True or false: chalk on a gym bar gives less friction. (a) False (b) True
10. 10.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, a glass sheet 2 N, a wooden plank 6 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) sandpaper (d) a wooden plank
12. 12.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
13. 13.True or false: a tyre with deep treads gives more friction. (a) False (b) True
14. 14.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 12 N, a glass sheet 2 N, a wooden plank 6 N, a carpet 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
15. 15.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) polished marble (d) ice
16. 16.True or false: powder on a carrom board gives more friction. (a) True (b) False
17. 17.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 7 N, sandpaper 11 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🔍 Which is the odd one out? (a) a wet tiled floor (b) a grippy rubber sole (c) a smooth steel slide (d) powder on a carrom board
20. 20.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem
21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 11 N, ice 4 N, a wooden plank 6 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) ice
22. 22.🛞 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 5 N, sandpaper 7 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) ice
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 7 N, a carpet 8 N, sandpaper 12 N. Which surface gave the most friction? (a) a glass sheet (b) ice (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.🛞 Is friction helpful or a problem here: writing with a pencil? (a) a problem (b) helpful
26. 26.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a rough doormat (c) oil on a squeaky hinge (d) a box pushed on carpet
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, a glass sheet 4 N, a wooden plank 8 N, a carpet 12 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) a wooden plank (d) sandpaper
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 9 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) a wooden plank (b) ice (c) sandpaper (d) a carpet
29. 29.🛞 Why are tyres made with deep treads? (a) to look nice (b) to grip the road (c) to go slower (d) to save rubber
30. 30.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
31. 31.🔍 Which is the odd one out? (a) a grippy rubber sole (b) sand on a slippery path (c) skating on ice (d) a box pushed on carpet
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 6 N, ice 2 N, a wooden plank 3 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 glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, sandpaper 11 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 5 N, a carpet 6 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on ice?
35. 35.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
36. 36.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 11 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on sandpaper than on ice?
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 11 N, ice 4 N, a glass sheet 7 N, a wooden plank 10 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
39. 39.True or false: chalk on a gym bar gives more friction. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a wet tiled floor (b) sand on a slippery path (c) a grippy rubber sole (d) a rough doormat

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