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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 455 · 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 force of 300 N did 1200 J of work. How many metres did the object move?
  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.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  5. 5.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 6 m took 1320 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  16. 16.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 320 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 3 m took 120 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  26. 26.🏋️ 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)
  27. 27.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 270 N did 1620 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  35. 35.🏋️ A force of 360 N did 2520 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 30 N did 180 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 50 N did 400 J of work. How many metres did the object move?

Answer key

  1. 4
  2. 850
  3. load ÷ effort
  4. joule (J)
  5. 2
  6. 220
  7. 2
  8. 90
  9. 700
  10. 3
  11. 170
  12. 7
  13. 1
  14. 4
  15. less effort
  16. 4
  17. 1280
  18. 3
  19. 40
  20. 5
  21. 240
  22. 300
  23. 240
  24. 230
  25. no, work stays the same
  26. 600
  27. 180
  28. 4
  29. 3
  30. 6
  31. 170
  32. 1440
  33. 960
  34. through a distance
  35. 7
  36. 9
  37. 6
  38. 1850
  39. 6
  40. 8

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