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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 309 · 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.

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  1. 1.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  3. 3.🏋️ 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?
  4. 4.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 70 N did 420 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 380 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 330 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 9 m took 90 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ 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?
  28. 28.🏋️ Pushing a crate 10 m took 900 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 370 N did 3330 J of work. How many metres did the object move?
  30. 30.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  31. 31.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  34. 34.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 90 N did 360 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?

Answer key

  1. 2
  2. load ÷ effort
  3. 800
  4. 2
  5. 6
  6. 3
  7. 4
  8. 10
  9. 3
  10. 430
  11. 170
  12. through a distance
  13. 600
  14. 3
  15. 2660
  16. 2
  17. 5
  18. 1380
  19. 2970
  20. 8
  21. 10
  22. 5
  23. 370
  24. 390
  25. 780
  26. 750
  27. 60
  28. 90
  29. 9
  30. joule (J)
  31. 5
  32. 190
  33. 290
  34. 120
  35. 4
  36. 500
  37. 440
  38. 440
  39. 130
  40. 7

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