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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 423 · 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.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  2. 2.🏋️ 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?
  3. 3.🏋️ A force of 20 N did 60 J of work. How many metres did the object move?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  5. 5.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  8. 8.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 10 N did 80 J of work. How many metres did the object move?
  18. 18.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  22. 22.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  23. 23.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 390 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  26. 26.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 270 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. joule (J)
  2. 850
  3. 3
  4. through a distance
  5. 2
  6. 800
  7. load ÷ effort
  8. 7
  9. 6
  10. 150
  11. 260
  12. 90
  13. 50
  14. 70
  15. 320
  16. 950
  17. 8
  18. 3
  19. 500
  20. 470
  21. 7
  22. no, work stays the same
  23. 2150
  24. 2340
  25. 110
  26. 160
  27. 200
  28. 350
  29. 1400
  30. 3
  31. 2080
  32. 190
  33. 5
  34. 1200
  35. 700
  36. 3
  37. 1080
  38. 3
  39. 600
  40. 350

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