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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 326 · 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 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A 13 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.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  4. 4.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  6. 6.🏋️ 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)
  7. 7.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  14. 14.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ 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?
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 90 N did 540 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  23. 23.🏋️ 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?
  24. 24.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  26. 26.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  27. 27.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  29. 29.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 9 m took 1980 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)

Answer key

  1. 5
  2. 650
  3. load ÷ effort
  4. 340
  5. 7
  6. 750
  7. 6
  8. 6
  9. 3
  10. 1260
  11. 500
  12. 560
  13. 240
  14. 120
  15. 680
  16. 3
  17. 70
  18. 6
  19. 900
  20. 2450
  21. 2
  22. 3
  23. 190
  24. 90
  25. 200
  26. through a distance
  27. 290
  28. 370
  29. 120
  30. 3
  31. 220
  32. 360
  33. 50
  34. 1000
  35. 500
  36. 3
  37. 360
  38. 350
  39. 450
  40. joule (J)

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