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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 289 · 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 machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  4. 4.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  6. 6.🏋️ Pushing a crate 1 m took 460 J of work. What force was used, in newtons?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  8. 8.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  14. 14.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 10 N did 80 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
  17. 17.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  18. 18.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  22. 22.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 260 N did 1560 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  29. 29.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 310 N did 2170 J of work. How many metres did the object move?
  35. 35.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?

Answer key

  1. 6
  2. 5
  3. 210
  4. 40
  5. load ÷ effort
  6. 460
  7. no, work stays the same
  8. 2600
  9. 50
  10. 5
  11. 200
  12. 90
  13. joule (J)
  14. 250
  15. 8
  16. 5
  17. less effort
  18. 550
  19. 1170
  20. 240
  21. through a distance
  22. 800
  23. 1100
  24. 6
  25. 80
  26. 4
  27. 150
  28. 180
  29. 60
  30. 440
  31. 460
  32. 750
  33. 100
  34. 7
  35. 180
  36. 630
  37. 5
  38. 330
  39. 6
  40. 1

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