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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 434 · 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 330 N did 2970 J of work. How many metres did the object move?
  2. 2.🏋️ A 1 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.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  6. 6.🏋️ A force of 350 N did 700 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 130 N did 780 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 210 N did 840 J of work. How many metres did the object move?
  14. 14.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  15. 15.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  21. 21.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  22. 22.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 270 N did 1620 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  27. 27.🏋️ 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
  28. 28.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
  30. 30.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  31. 31.🏋️ A force of 260 N did 2600 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
  36. 36.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 9
  2. 50
  3. 6
  4. 850
  5. through a distance
  6. 2
  7. 3
  8. 3
  9. 50
  10. 130
  11. 6
  12. 3
  13. 4
  14. less effort
  15. 120
  16. 260
  17. 2
  18. 360
  19. 100
  20. 5
  21. joule (J)
  22. 220
  23. 450
  24. 30
  25. 6
  26. 6
  27. no, work stays the same
  28. 230
  29. 400
  30. load ÷ effort
  31. 10
  32. 1350
  33. 2
  34. 80
  35. 30
  36. 10
  37. 490
  38. 3
  39. 550
  40. 350

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