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Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 17 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🛞 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 11 N, a glass sheet 3 N. Which surface gave the most friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
  2. 2.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
  3. 3.🛞 Is friction helpful or a problem here: walking without slipping? (a) helpful (b) a problem
  4. 4.True or false: oil on a squeaky hinge gives more friction. (a) False (b) True
  5. 5.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 3 N, a carpet 5 N, sandpaper 8 N, ice 2 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a carpet (d) a wooden plank
  6. 6.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 9 N, a carpet 10 N, ice 2 N, a glass sheet 6 N. How many newtons more were needed on a carpet than on ice?
  7. 7.True or false: powder on a carrom board gives less friction. (a) False (b) True
  8. 8.True or false: a wheel on ball bearings gives less friction. (a) False (b) True
  9. 9.True or false: a tyre with deep treads gives less friction. (a) True (b) False
  10. 10.True or false: sand on a slippery path gives less friction. (a) False (b) True
  11. 11.🛞 Is friction helpful or a problem here: a door hinge squeaking? (a) a problem (b) helpful
  12. 12.🛞 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 2 N, a glass sheet 5 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) sandpaper (d) a wooden plank
  13. 13.🔍 Which is the odd one out? (a) a smooth steel slide (b) powder on a carrom board (c) chalk on a gym bar (d) oil on a squeaky hinge
  14. 14.🛞 More or less friction: chalk on a gym bar? (a) more friction (b) less friction
  15. 15.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
  16. 16.True or false: a box pushed on carpet gives more friction. (a) False (b) True
  17. 17.True or false: a smooth steel slide gives less friction. (a) False (b) True
  18. 18.🛞 Is friction helpful or a problem here: striking a matchstick? (a) helpful (b) a problem
  19. 19.🛞 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 10 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
  20. 20.🔍 Which is the odd one out? (a) a tyre with deep treads (b) sand on a slippery path (c) a grippy rubber sole (d) skating on ice
  21. 21.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 7 N, a glass sheet 1 N, a wooden plank 2 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a carpet (d) a glass sheet
  22. 22.🛞 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, ice 3 N, a glass sheet 6 N. How many newtons more were needed on a carpet than on ice?
  23. 23.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a rough doormat (c) a box pushed on carpet (d) a wheel on ball bearings
  24. 24.True or false: sand on a slippery path gives more friction. (a) True (b) False
  25. 25.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 8 N, a glass sheet 2 N, a wooden plank 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
  26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 6 N, a carpet 7 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on a glass sheet?
  27. 27.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) helpful (b) a problem
  28. 28.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a wooden plank 6 N, a carpet 7 N, sandpaper 11 N. How many newtons more were needed on sandpaper than on a glass sheet?
  29. 29.🛞 More or less friction: a tyre with deep treads? (a) more friction (b) less friction
  30. 30.True or false: a smooth steel slide gives more friction. (a) True (b) False
  31. 31.🛞 More or less friction: sand on a slippery path? (a) more friction (b) less friction
  32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, ice 1 N, a glass sheet 3 N, a wooden plank 7 N. Which surface gave the least friction? (a) ice (b) a wooden plank (c) a carpet (d) a glass sheet
  33. 33.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, ice 1 N, a glass sheet 3 N, a wooden plank 6 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) a wooden plank
  34. 34.🛞 Is friction helpful or a problem here: writing with a pencil? (a) helpful (b) a problem
  35. 35.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
  36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 4 N, a carpet 5 N, sandpaper 7 N, ice 2 N. How many newtons more were needed on sandpaper than on ice?
  37. 37.🛞 Which surface gives the MOST friction to a sliding block? (a) polished marble (b) sandpaper (c) ice (d) glass
  38. 38.🛞 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 12 N, ice 4 N. Which surface gave the least friction? (a) a carpet (b) a glass sheet (c) ice (d) a wooden plank
  39. 39.🔍 Which is the odd one out? (a) a box pushed on carpet (b) chalk on a gym bar (c) oil on a squeaky hinge (d) sand on a slippery path
  40. 40.🔍 Which is the odd one out? (a) skating on ice (b) a box pushed on carpet (c) powder on a carrom board (d) a wet tiled floor

Answer key

  1. sandpaper
  2. a problem
  3. helpful
  4. False
  5. sandpaper
  6. 8
  7. True
  8. True
  9. False
  10. False
  11. a problem
  12. sandpaper
  13. chalk on a gym bar
  14. more friction
  15. False
  16. True
  17. True
  18. helpful
  19. a glass sheet
  20. skating on ice
  21. a glass sheet
  22. 6
  23. a wheel on ball bearings
  24. True
  25. 6
  26. 8
  27. helpful
  28. 8
  29. more friction
  30. False
  31. more friction
  32. ice
  33. a carpet
  34. helpful
  35. True
  36. 5
  37. sandpaper
  38. ice
  39. oil on a squeaky hinge
  40. a box pushed on carpet

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