Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 470 · 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.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
2. 2.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
3. 3.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) sand on a slippery path (c) a tyre with deep treads (d) a grippy rubber sole
4. 4.🛞 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 6 N, a carpet 9 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
5. 5.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) skating on ice (d) a tyre with deep treads
6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 4 N, sandpaper 7 N, ice 1 N. Which surface gave the least friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
7. 7.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 8 N, sandpaper 10 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) a wooden plank
8. 8.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, a glass sheet 4 N, a wooden plank 7 N, a carpet 10 N. Which surface gave the most friction? (a) sandpaper (b) a carpet (c) a glass sheet (d) a wooden plank
9. 9.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
10. 10.🔍 Which is the odd one out? (a) sand on a slippery path (b) a grippy rubber sole (c) a smooth steel slide (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 wooden plank 7 N, sandpaper 11 N, ice 3 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) ice
12. 12.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) helpful (b) a problem
13. 13.🛞 How can we reduce friction in a machine? (a) add sand (b) oil the moving parts (c) make parts rough (d) press parts harder
14. 14.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
15. 15.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, sandpaper 9 N, ice 2 N, a glass sheet 5 N. How many newtons more were needed on sandpaper than on ice?
17. 17.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction
18. 18.True or false: a box pushed on carpet gives more friction. (a) True (b) False
19. 19.🛞 More or less friction: chalk on a gym bar? (a) less friction (b) more friction
20. 20.🛞 Which surface gives the MOST friction to a sliding block? (a) ice (b) polished marble (c) sandpaper (d) glass
21. 21.🔍 Which is the odd one out? (a) a rough doormat (b) sand on a slippery path (c) chalk on a gym bar (d) skating on ice
22. 22.True or false: a wet tiled floor gives more friction. (a) True (b) False
23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 15 N, ice 3 N, a glass sheet 7 N, a carpet 11 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a glass sheet (d) a carpet
24. 24.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 10 N, sandpaper 12 N, ice 3 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a wooden plank (d) sandpaper
25. 25.🛞 Why are tyres made with deep treads? (a) to go slower (b) to save rubber (c) to look nice (d) to grip the road
26. 26.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
27. 27.True or false: skating on ice 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: a glass sheet 4 N, a wooden plank 6 N, a carpet 10 N, sandpaper 12 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 5 N, a carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
30. 30.🛞 More or less friction: skating on ice? (a) less friction (b) more friction
31. 31.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 12 N, ice 1 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
32. 32.🛞 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, ice 1 N, a glass sheet 3 N. Which surface gave the least friction? (a) ice (b) a carpet (c) a wooden plank (d) a glass sheet
33. 33.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 14 N, a glass sheet 2 N, a wooden plank 6 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: a carpet 6 N, sandpaper 8 N, ice 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
36. 36.True or false: a smooth steel slide gives less friction. (a) False (b) True
37. 37.True or false: a tyre with deep treads gives less friction. (a) False (b) True
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 4 N, a wooden plank 5 N, a carpet 9 N, sandpaper 12 N. How many newtons more were needed on sandpaper than on a glass sheet?
39. 39.🔍 Which is the odd one out? (a) a wet tiled floor (b) oil on a squeaky hinge (c) sand on a slippery path (d) skating on ice
40. 40.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) helpful (b) a problem

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