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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 118 · 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 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 230 N did 2300 J of work. How many metres did the object move?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  6. 6.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  10. 10.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  20. 20.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  21. 21.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ 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)
  23. 23.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  27. 27.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 50 N pushes a cart 5 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 90 N did 540 J of work. How many metres did the object move?
  38. 38.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  39. 39.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 5
  2. 150
  3. 10
  4. 300
  5. no, work stays the same
  6. 430
  7. 230
  8. 1760
  9. 4
  10. 3
  11. 5
  12. 800
  13. 800
  14. 130
  15. 190
  16. 480
  17. 6
  18. 110
  19. load ÷ effort
  20. 90
  21. 40
  22. 750
  23. 270
  24. 3
  25. 540
  26. joule (J)
  27. 1260
  28. 6
  29. 140
  30. 6
  31. 250
  32. 2
  33. 7
  34. 430
  35. 6
  36. 5
  37. 6
  38. through a distance
  39. 450
  40. 680

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