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Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 698 · 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.True or false: sand on a slippery path gives more friction. (a) False (b) True
  2. 2.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
  3. 3.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 13 N, ice 4 N, a glass sheet 5 N, a wooden plank 9 N. Which surface gave the most friction? (a) ice (b) a carpet (c) a glass sheet (d) a wooden plank
  4. 4.🛞 More or less friction: a wet tiled floor? (a) less friction (b) more friction
  5. 5.🛞 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 9 N, sandpaper 12 N. Which surface gave the least friction? (a) sandpaper (b) a carpet (c) a wooden plank (d) a glass sheet
  6. 6.🛞 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 14 N. Which surface gave the least friction? (a) a wooden plank (b) a carpet (c) sandpaper (d) a glass sheet
  7. 7.True or false: a wet tiled floor gives less friction. (a) False (b) True
  8. 8.🛞 More or less friction: sand on a slippery path? (a) less friction (b) more friction
  9. 9.True or false: a smooth steel slide gives more friction. (a) True (b) False
  10. 10.🔍 Which is the odd one out? (a) a wheel on ball bearings (b) a tyre with deep treads (c) oil on a squeaky hinge (d) a smooth steel slide
  11. 11.🛞 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 7 N, sandpaper 10 N. Which surface gave the most friction? (a) a wooden plank (b) a glass sheet (c) sandpaper (d) a carpet
  12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 5 N, a carpet 8 N, sandpaper 11 N, a glass sheet 1 N. Which surface gave the least friction? (a) a wooden plank (b) sandpaper (c) a carpet (d) a glass sheet
  13. 13.🔍 Which is the odd one out? (a) chalk on a gym bar (b) a box pushed on carpet (c) a wet tiled floor (d) sand on a slippery path
  14. 14.True or false: chalk on a gym bar gives more friction. (a) True (b) False
  15. 15.🛞 More or less friction: oil on a squeaky hinge? (a) more friction (b) less friction
  16. 16.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 9 N, sandpaper 12 N, a glass sheet 2 N, a wooden plank 5 N. How many newtons more were needed on sandpaper than on a glass sheet?
  17. 17.🔍 Which is the odd one out? (a) chalk on a gym bar (b) skating on ice (c) a box pushed on carpet (d) a grippy rubber sole
  18. 18.🔍 Which is the odd one out? (a) skating on ice (b) a wheel on ball bearings (c) chalk on a gym bar (d) a smooth steel slide
  19. 19.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 5 N, a carpet 6 N, sandpaper 7 N, ice 4 N. Which surface gave the most friction? (a) sandpaper (b) ice (c) a glass sheet (d) a carpet
  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 9 N, ice 1 N. Which surface gave the most friction? (a) a carpet (b) a wooden plank (c) a glass sheet (d) ice
  21. 21.🛞 Which surface gives the MOST friction to a sliding block? (a) sandpaper (b) glass (c) ice (d) polished marble
  22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 3 N, sandpaper 7 N, ice 1 N. How many newtons more were needed on sandpaper than on ice?
  23. 23.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 2 N, a wooden plank 4 N, a carpet 7 N, sandpaper 8 N. How many newtons more were needed on sandpaper than on a glass sheet?
  24. 24.True or false: a tyre with deep treads 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 wooden plank 8 N, a carpet 10 N, sandpaper 14 N, ice 4 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
  26. 26.True or false: a rough doormat gives more friction. (a) False (b) True
  27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 7 N, a carpet 9 N, sandpaper 11 N, a glass sheet 4 N. How many newtons more were needed on sandpaper than on a glass sheet?
  28. 28.🛞 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 9 N, sandpaper 10 N. Which surface gave the least friction? (a) sandpaper (b) a wooden plank (c) a glass sheet (d) a carpet
  29. 29.True or false: a smooth steel slide gives less friction. (a) False (b) True
  30. 30.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
  31. 31.🛞 Rubbing your hands fast makes them … (a) magnetic (b) wet (c) warm (d) cold
  32. 32.True or false: chalk on a gym bar gives less friction. (a) True (b) False
  33. 33.True or false: a wheel on ball bearings gives less friction. (a) True (b) False
  34. 34.🔍 Which is the odd one out? (a) a grippy rubber sole (b) a tyre with deep treads (c) a smooth steel slide (d) sand on a slippery path
  35. 35.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 3 N, a wooden plank 4 N, a carpet 5 N, sandpaper 8 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank
  36. 36.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 6 N, sandpaper 10 N, a glass sheet 4 N, a wooden plank 5 N. Which surface gave the most friction? (a) a glass sheet (b) a wooden plank (c) a carpet (d) sandpaper
  37. 37.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) helpful (b) a problem
  38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 7 N, a wooden plank 9 N, a carpet 10 N, ice 4 N. Which surface gave the most friction? (a) a wooden plank (b) a carpet (c) ice (d) a glass sheet
  39. 39.🛞 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 8 N. Which surface gave the most friction? (a) a glass sheet (b) sandpaper (c) a wooden plank (d) a carpet
  40. 40.True or false: a rough doormat gives less friction. (a) True (b) False

Answer key

  1. True
  2. less friction
  3. a carpet
  4. less friction
  5. a glass sheet
  6. a glass sheet
  7. True
  8. more friction
  9. False
  10. a tyre with deep treads
  11. sandpaper
  12. a glass sheet
  13. a wet tiled floor
  14. True
  15. less friction
  16. 10
  17. skating on ice
  18. chalk on a gym bar
  19. sandpaper
  20. a carpet
  21. sandpaper
  22. 6
  23. 6
  24. True
  25. ice
  26. True
  27. 7
  28. a glass sheet
  29. True
  30. more friction
  31. warm
  32. False
  33. True
  34. a smooth steel slide
  35. sandpaper
  36. sandpaper
  37. helpful
  38. a carpet
  39. sandpaper
  40. False

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