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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 356 · 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 240 N did 240 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  6. 6.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  8. 8.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  11. 11.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  13. 13.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  14. 14.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 150 N did 1350 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  21. 21.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 1 m took 180 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 2 m took 780 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  25. 25.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 30 N did 270 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 270 N did 1890 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 190 N pushes a cart 5 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 1
  2. 6
  3. 140
  4. 550
  5. joule (J)
  6. 550
  7. load ÷ effort
  8. 540
  9. 100
  10. through a distance
  11. 300
  12. 6
  13. less effort
  14. 220
  15. 3
  16. 9
  17. 200
  18. 5
  19. 400
  20. no, work stays the same
  21. 100
  22. 180
  23. 390
  24. 260
  25. 300
  26. 4
  27. 9
  28. 6
  29. 7
  30. 4
  31. 6
  32. 10
  33. 2400
  34. 3
  35. 950
  36. 180
  37. 320
  38. 700
  39. 270
  40. 50

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