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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 427 · 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.🏋️ A force of 80 N did 720 J of work. How many metres did the object move?
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  4. 4.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Pushing a crate 7 m took 1820 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  9. 9.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  10. 10.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  12. 12.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ 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?
  17. 17.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 460 N did 3220 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  26. 26.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 9 m took 2790 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 4 m took 640 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  38. 38.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. 9
  3. joule (J)
  4. less effort
  5. 350
  6. 260
  7. 60
  8. no, work stays the same
  9. through a distance
  10. 100
  11. 2
  12. 3
  13. 90
  14. 3
  15. 400
  16. 40
  17. 760
  18. 360
  19. 130
  20. 90
  21. 7
  22. 30
  23. 2
  24. 4
  25. load ÷ effort
  26. 220
  27. 80
  28. 30
  29. 2340
  30. 6
  31. 350
  32. 310
  33. 850
  34. 310
  35. 5
  36. 160
  37. 250
  38. 240
  39. 2
  40. 3

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