Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 651 · 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.🔍 Which is the odd one out? (a) a rough doormat (b) chalk on a gym bar (c) a box pushed on carpet (d) a wet tiled floor
2. 2.🔍 Which is the odd one out? (a) a tyre with deep treads (b) powder on a carrom board (c) a rough doormat (d) chalk on a gym bar
3. 3.True or false: a smooth steel slide gives less friction. (a) True (b) False
4. 4.🛞 Rubbing your hands fast makes them … (a) wet (b) cold (c) magnetic (d) warm
5. 5.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) sandpaper (d) glass
6. 6.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 8 N, a carpet 9 N, sandpaper 13 N. How many newtons more were needed on sandpaper than on ice?
8. 8.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
9. 9.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
10. 10.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 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?
11. 11.🔍 Which is the odd one out? (a) a rough doormat (b) a wheel on ball bearings (c) sand on a slippery path (d) a grippy rubber sole
12. 12.🛞 More or less friction: a wheel on ball bearings? (a) more friction (b) less friction
13. 13.True or false: skating on ice gives more friction. (a) False (b) True
14. 14.True or false: a wet tiled floor gives less friction. (a) False (b) True
15. 15.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
16. 16.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
17. 17.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 9 N, ice 2 N, a wooden plank 5 N, a carpet 6 N. How many newtons more were needed on sandpaper than on ice?
19. 19.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
20. 20.🛞 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, sandpaper 8 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
21. 21.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
22. 22.🔍 Which is the odd one out? (a) a tyre with deep treads (b) a grippy rubber sole (c) skating on ice (d) sand on a slippery path
23. 23.True or false: chalk on a gym bar gives more friction. (a) True (b) False
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, ice 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on ice?
25. 25.🛞 Friction acts … (a) only upwards (b) with the motion (c) only on ice (d) against the motion
26. 26.True or false: sand on a slippery path gives less friction. (a) True (b) False
27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a glass sheet 6 N, a wooden plank 7 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on ice?
28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 2 N, a carpet 3 N, sandpaper 6 N, ice 1 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) ice
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 10 N, sandpaper 12 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
30. 30.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
31. 31.🔍 Which is the odd one out? (a) a smooth steel slide (b) sand on a slippery path (c) powder on a carrom board (d) skating on ice
32. 32.🛞 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 1 N. How many newtons more were needed on sandpaper than on ice?
33. 33.🔍 Which is the odd one out? (a) a smooth steel slide (b) a rough doormat (c) a grippy rubber sole (d) sand on a slippery path
34. 34.True or false: a tyre with deep treads gives more friction. (a) False (b) True
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 5 N, ice 1 N, a glass sheet 2 N, a carpet 4 N. Which surface gave the least friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
36. 36.🔍 Which is the odd one out? (a) a grippy rubber sole (b) powder on a carrom board (c) a wet tiled floor (d) skating on ice
37. 37.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a carpet 3 N, sandpaper 5 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
39. 39.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
40. 40.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem

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