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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 11 · 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 90 N did 360 J of work. How many metres did the object move?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  3. 3.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  11. 11.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  15. 15.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 350 N did 3150 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  19. 19.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 280 N did 560 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 110 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 5 m took 2150 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  31. 31.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 2 m took 800 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 4
  2. through a distance
  3. 390
  4. 430
  5. 6
  6. 100
  7. 480
  8. 120
  9. 7
  10. load ÷ effort
  11. 60
  12. 2
  13. 1760
  14. joule (J)
  15. 640
  16. 9
  17. 190
  18. no, work stays the same
  19. 1680
  20. 2
  21. 200
  22. 660
  23. 430
  24. 4
  25. 480
  26. 850
  27. 150
  28. 150
  29. 230
  30. 240
  31. 900
  32. 3330
  33. 240
  34. 3500
  35. 900
  36. 480
  37. 4400
  38. 400
  39. 950
  40. 600

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