← Friction lesson New set →

Engineering Worksheet: Friction

Engineering lesson 10: Friction · Set 909 · 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.🛞 Is friction helpful or a problem here: tyres wearing down? (a) helpful (b) a problem
  2. 2.🛞 Friction acts … (a) only on ice (b) against the motion (c) only upwards (d) with the motion
  3. 3.🛞 How can we reduce friction in a machine? (a) press parts harder (b) oil the moving parts (c) make parts rough (d) add sand
  4. 4.🛞 Is friction helpful or a problem here: striking a matchstick? (a) a problem (b) helpful
  5. 5.🛞 More or less friction: a rough doormat? (a) more friction (b) less friction
  6. 6.🛞 Is friction helpful or a problem here: a knot holding a rope? (a) a problem (b) helpful
  7. 7.🛞 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 3 N. How many newtons more were needed on sandpaper than on ice?
  8. 8.🛞 Which surface gives the MOST friction to a sliding block? (a) glass (b) sandpaper (c) polished marble (d) ice
  9. 9.True or false: a rough doormat gives more friction. (a) True (b) False
  10. 10.🛞 More or less friction: skating on ice? (a) more friction (b) less friction
  11. 11.True or false: a tyre with deep treads gives more friction. (a) False (b) True
  12. 12.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 3 N, a carpet 4 N, sandpaper 7 N, ice 2 N. Which surface gave the most friction? (a) a glass sheet (b) ice (c) a carpet (d) sandpaper
  13. 13.🛞 More or less friction: a tyre with deep treads? (a) less friction (b) more friction
  14. 14.🔍 Which is the odd one out? (a) oil on a squeaky hinge (b) a grippy rubber sole (c) chalk on a gym bar (d) sand on a slippery path
  15. 15.True or false: a smooth steel slide gives less friction. (a) True (b) False
  16. 16.🛞 More or less friction: a grippy rubber sole? (a) less friction (b) more friction
  17. 17.🛞 Rubbing your hands fast makes them … (a) wet (b) magnetic (c) cold (d) warm
  18. 18.🛞 More or less friction: a smooth steel slide? (a) less friction (b) more friction
  19. 19.🔍 Which is the odd one out? (a) a rough doormat (b) a grippy rubber sole (c) a wet tiled floor (d) chalk on a gym bar
  20. 20.True or false: a rough doormat gives less friction. (a) False (b) True
  21. 21.True or false: a grippy rubber sole gives more friction. (a) True (b) False
  22. 22.🔍 Which is the odd one out? (a) a wet tiled floor (b) powder on a carrom board (c) a wheel on ball bearings (d) a box pushed on carpet
  23. 23.🛞 Is friction helpful or a problem here: machine parts heating up? (a) helpful (b) a problem
  24. 24.True or false: chalk on a gym bar gives less friction. (a) True (b) False
  25. 25.🔍 Which is the odd one out? (a) powder on a carrom board (b) a wet tiled floor (c) a tyre with deep treads (d) skating on ice
  26. 26.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a carpet 8 N, sandpaper 9 N, ice 3 N, a wooden plank 7 N. Which surface gave the least friction? (a) sandpaper (b) ice (c) a wooden plank (d) a carpet
  27. 27.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 8 N, sandpaper 11 N, ice 4 N, a glass sheet 7 N. How many newtons more were needed on sandpaper than on ice?
  28. 28.True or false: oil on a squeaky hinge gives more friction. (a) True (b) False
  29. 29.True or false: oil on a squeaky hinge gives less friction. (a) True (b) False
  30. 30.True or false: a wheel on ball bearings gives more friction. (a) False (b) True
  31. 31.🛞 Is friction helpful or a problem here: brakes stopping a cycle? (a) a problem (b) helpful
  32. 32.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: sandpaper 14 N, ice 2 N, a glass sheet 6 N, a carpet 10 N. How many newtons more were needed on sandpaper than on ice?
  33. 33.True or false: a wet tiled floor gives less friction. (a) True (b) False
  34. 34.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a wooden plank 7 N, a carpet 9 N, sandpaper 10 N. How many newtons more were needed on sandpaper than on ice?
  35. 35.True or false: a tyre with deep treads gives less friction. (a) False (b) True
  36. 36.🛞 More or less friction: powder on a carrom board? (a) more friction (b) less friction
  37. 37.🛞 More or less friction: a wheel on ball bearings? (a) less friction (b) more friction
  38. 38.🛞 More or less friction: a box pushed on carpet? (a) less friction (b) more friction
  39. 39.🔍 Which is the odd one out? (a) a wet tiled floor (b) chalk on a gym bar (c) oil on a squeaky hinge (d) skating on ice
  40. 40.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a wooden plank 6 N, a carpet 8 N, sandpaper 9 N, ice 4 N. Which surface gave the most friction? (a) ice (b) sandpaper (c) a carpet (d) a wooden plank

Answer key

  1. a problem
  2. against the motion
  3. oil the moving parts
  4. helpful
  5. more friction
  6. helpful
  7. 4
  8. sandpaper
  9. True
  10. less friction
  11. True
  12. sandpaper
  13. more friction
  14. oil on a squeaky hinge
  15. True
  16. more friction
  17. warm
  18. less friction
  19. a wet tiled floor
  20. False
  21. True
  22. a box pushed on carpet
  23. a problem
  24. False
  25. a tyre with deep treads
  26. ice
  27. 7
  28. False
  29. True
  30. False
  31. helpful
  32. 12
  33. True
  34. 6
  35. False
  36. less friction
  37. less friction
  38. more friction
  39. chalk on a gym bar
  40. sandpaper

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