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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 536 · 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.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  4. 4.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 80 N did 240 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  14. 14.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 300 N did 2700 J of work. How many metres did the object move?
  16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  17. 17.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  21. 21.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  23. 23.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  30. 30.🏋️ 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?
  31. 31.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  34. 34.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  35. 35.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 7
  2. 9
  3. load ÷ effort
  4. 4
  5. 600
  6. 370
  7. 250
  8. 2
  9. 2100
  10. 3
  11. 720
  12. 50
  13. 20
  14. 550
  15. 9
  16. through a distance
  17. 7
  18. 6
  19. 2
  20. no, work stays the same
  21. 130
  22. less effort
  23. 130
  24. 2240
  25. 3
  26. 3
  27. 250
  28. 2
  29. 240
  30. 180
  31. 70
  32. 400
  33. 5
  34. joule (J)
  35. 4
  36. 1520
  37. 6
  38. 560
  39. 5
  40. 350

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