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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 934 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ Pushing a crate 8 m took 1520 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  4. 4.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  6. 6.🏋️ Pushing a crate 9 m took 1980 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 380 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  13. 13.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  23. 23.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 240 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  27. 27.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  28. 28.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 170 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?

Answer key

  1. 190
  2. 3
  3. no, work stays the same
  4. 350
  5. less effort
  6. 220
  7. 2660
  8. 3
  9. 500
  10. 3
  11. 3760
  12. 8
  13. 180
  14. 30
  15. 5
  16. 6
  17. 800
  18. 50
  19. 230
  20. 210
  21. 900
  22. load ÷ effort
  23. 200
  24. 1680
  25. 40
  26. 380
  27. through a distance
  28. 2
  29. 1360
  30. 60
  31. 6
  32. 4
  33. 440
  34. 5
  35. 4
  36. 150
  37. 110
  38. 870
  39. 360
  40. 2

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