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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 808 · 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.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  6. 6.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  10. 10.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ 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)
  12. 12.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 190 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 330 N did 3300 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 70 N did 490 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?
  27. 27.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 240 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  33. 33.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  36. 36.🏋️ A force of 250 N did 500 J of work. How many metres did the object move?
  37. 37.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  38. 38.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?

Answer key

  1. 380
  2. 3
  3. 6
  4. 5
  5. load ÷ effort
  6. 180
  7. 6
  8. 2450
  9. 2
  10. 330
  11. 950
  12. 80
  13. 700
  14. 340
  15. 3
  16. 210
  17. 5
  18. 760
  19. 10
  20. 3
  21. 350
  22. 200
  23. 400
  24. 320
  25. 7
  26. 20
  27. 5
  28. 500
  29. 2
  30. 2400
  31. 150
  32. joule (J)
  33. 6
  34. 900
  35. no, work stays the same
  36. 2
  37. through a distance
  38. 160
  39. 650
  40. 440

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