Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 203 · 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: a wheel on ball bearings gives less friction. (a) False (b) True
2. 2.🛞 Why are tyres made with deep treads? (a) to grip the road (b) to save rubber (c) to look nice (d) to go slower
3. 3.True or false: a box pushed on carpet gives more friction. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a rough doormat (d) a box pushed on carpet
5. 5.True or false: a rough doormat gives less friction. (a) False (b) True
6. 6.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
7. 7.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a rough doormat (c) oil on a squeaky hinge (d) a box pushed on carpet
8. 8.🛞 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, sandpaper 7 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
9. 9.True or false: a tyre with deep treads gives less friction. (a) False (b) True
10. 10.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 7 N, a glass sheet 2 N, a wooden plank 3 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
12. 12.True or false: skating on ice gives more friction. (a) True (b) False
13. 13.🛞 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 5 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
14. 14.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
15. 15.True or false: a wet tiled floor gives less friction. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) a wheel on ball bearings (d) oil on a squeaky hinge
17. 17.True or false: sand on a slippery path gives more friction. (a) False (b) True
18. 18.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 6 N, a wooden plank 8 N, sandpaper 10 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) ice
19. 19.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
20. 20.True or false: a rough doormat gives more friction. (a) False (b) True
21. 21.True or false: skating on ice gives less friction. (a) True (b) False
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 2 N, a glass sheet 4 N, a wooden plank 6 N. Which surface gave the least friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
23. 23.True or false: a grippy rubber sole gives less friction. (a) True (b) False
24. 24.True or false: sand on a slippery path gives less friction. (a) False (b) True
25. 25.True or false: a box pushed on carpet gives less friction. (a) True (b) False
26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 13 N, ice 3 N, a wooden plank 6 N, a carpet 10 N. How many newtons more were needed on sandpaper than on ice?
27. 27.🛞 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 7 N, sandpaper 8 N. Which surface gave the most friction? (a) a glass sheet (b) a carpet (c) sandpaper (d) a wooden plank
28. 28.🛞 How can we reduce friction in a machine? (a) oil the moving parts (b) make parts rough (c) add sand (d) press parts harder
29. 29.🛞 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 carpet 10 N, sandpaper 14 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a glass sheet (d) ice
30. 30.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
31. 31.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) helpful (b) a problem
32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a glass sheet 4 N, a carpet 5 N, sandpaper 9 N. Which surface gave the most friction? (a) a carpet (b) a glass sheet (c) ice (d) sandpaper
33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 12 N, ice 3 N, a glass sheet 6 N. How many newtons more were needed on a carpet than on ice?
34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, sandpaper 10 N, a glass sheet 1 N, a wooden plank 4 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) a wooden plank (d) a glass sheet
35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 7 N, ice 1 N, a glass sheet 5 N. Which surface gave the most friction? (a) ice (b) a wooden plank (c) sandpaper (d) a glass sheet
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 7 N, ice 4 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the most friction? (a) a carpet (b) ice (c) a glass sheet (d) a wooden plank
37. 37.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, a carpet 9 N, sandpaper 12 N, a glass sheet 4 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
38. 38.🔍 Which is the odd one out? (a) skating on ice (b) oil on a squeaky hinge (c) a wheel on ball bearings (d) a box pushed on carpet
39. 39.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 10 N, sandpaper 11 N, a glass sheet 3 N, a wooden plank 7 N. How many newtons more were needed on sandpaper than on a glass sheet?
40. 40.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction

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