Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 583 · 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 save rubber (b) to go slower (c) to grip the road (d) to look nice
2. 2.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, sandpaper 10 N, ice 2 N, a glass sheet 3 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) ice (d) a glass sheet
3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 6 N, a wooden plank 10 N, a carpet 11 N, ice 3 N. Which surface gave the least friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
4. 4.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 2 N, a glass sheet 3 N, a carpet 5 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) ice
6. 6.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) wet (d) magnetic
7. 7.True or false: sand on a slippery path gives more friction. (a) False (b) True
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, a carpet 6 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
9. 9.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 5 N, sandpaper 8 N, a glass sheet 3 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
10. 10.🛞 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, sandpaper 13 N, a glass sheet 2 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) sandpaper (d) a carpet
11. 11.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 6 N, sandpaper 7 N, ice 1 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) ice (d) a carpet
12. 12.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
13. 13.🛞 Is friction helpful or a problem here: gripping a cricket bat? (a) a problem (b) helpful
14. 14.🛞 Friction acts … (a) with the motion (b) only upwards (c) only on ice (d) against the motion
15. 15.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 2 N, a wooden plank 6 N, a carpet 7 N, sandpaper 9 N. How many newtons more were needed on sandpaper than on ice?
17. 17.🛞 More or less friction: a smooth steel slide? (a) more friction (b) less friction
18. 18.True or false: sand on a slippery path gives less friction. (a) True (b) False
19. 19.🛞 More or less friction: a tyre with deep treads? (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 glass sheet 5 N, a wooden plank 6 N, a carpet 10 N, ice 1 N. Which surface gave the least friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) ice
21. 21.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a box pushed on carpet (c) a rough doormat (d) a wheel on ball bearings
22. 22.🔍 Which is the odd one out? (a) a smooth steel slide (b) oil on a squeaky hinge (c) sand on a slippery path (d) skating on ice
23. 23.True or false: a grippy rubber sole gives more friction. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) skating on ice (c) a grippy rubber sole (d) a wet tiled floor
25. 25.True or false: oil on a squeaky hinge 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: a glass sheet 4 N, a carpet 7 N, sandpaper 9 N, ice 1 N. Which surface gave the most friction? (a) a carpet (b) sandpaper (c) ice (d) a glass sheet
27. 27.🔍 Which is the odd one out? (a) skating on ice (b) a rough doormat (c) oil on a squeaky hinge (d) a wet tiled floor
28. 28.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
29. 29.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 5 N, a carpet 6 N, sandpaper 8 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) a carpet (d) sandpaper
30. 30.🛞 More or less friction: a rough doormat? (a) less friction (b) more friction
31. 31.True or false: a tyre with deep treads gives more friction. (a) True (b) False
32. 32.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
33. 33.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
34. 34.🔍 Which is the odd one out? (a) powder on a carrom board (b) chalk on a gym bar (c) a wet tiled floor (d) skating on ice
35. 35.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 7 N, ice 3 N, a glass sheet 5 N, a wooden plank 6 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) ice (d) sandpaper
37. 37.🛞 Is friction helpful or a problem here: shoe soles wearing out? (a) a problem (b) helpful
38. 38.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
39. 39.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
40. 40.🛞 More or less friction: a wet tiled floor? (a) more friction (b) less friction

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