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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 952 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  9. 9.🏋️ A force of 220 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  11. 11.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  12. 12.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 1 m took 480 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 440 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  19. 19.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 4 m took 1320 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 8 m took 720 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  28. 28.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  29. 29.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 420 N did 3780 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 10 m took 3300 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 160 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 6 m took 240 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 110 N did 110 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 9 m took 4050 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 750
  3. 2
  4. 280
  5. 1
  6. 5
  7. 600
  8. joule (J)
  9. 880
  10. less effort
  11. load ÷ effort
  12. 470
  13. 350
  14. 7
  15. 480
  16. 700
  17. 2200
  18. 440
  19. 510
  20. 720
  21. 60
  22. 90
  23. 150
  24. 6
  25. 330
  26. 90
  27. 1
  28. through a distance
  29. 200
  30. 320
  31. 2
  32. 9
  33. 330
  34. 1600
  35. 40
  36. 6
  37. 1
  38. 3870
  39. 390
  40. 450

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