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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 14 · 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 6 m took 900 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 7 m took 3080 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  7. 7.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  13. 13.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  20. 20.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 170 N did 510 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  33. 33.🏋️ A force of 270 N pushes a cart 6 m along the floor. How much work is done, in joules?
  34. 34.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  35. 35.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  37. 37.🏋️ 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?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 430 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?

Answer key

  1. 150
  2. 440
  3. 190
  4. 2
  5. 5
  6. 3
  7. 400
  8. 3
  9. 3840
  10. 80
  11. 630
  12. no, work stays the same
  13. 140
  14. 120
  15. 420
  16. 4
  17. 1
  18. 3
  19. 210
  20. 30
  21. 340
  22. 750
  23. 4
  24. 3
  25. 3
  26. 1320
  27. 460
  28. 350
  29. 3
  30. 6
  31. 420
  32. load ÷ effort
  33. 1620
  34. joule (J)
  35. 2
  36. 490
  37. 130
  38. 50
  39. 3440
  40. 5

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