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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 315 · 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.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ 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?
  5. 5.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  6. 6.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  7. 7.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  11. 11.🏋️ A force of 340 N did 1360 J of work. How many metres did the object move?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  13. 13.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  27. 27.🏋️ 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?
  28. 28.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 7 m took 3220 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  36. 36.🏋️ 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?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  38. 38.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?

Answer key

  1. 900
  2. 2
  3. 720
  4. 100
  5. less effort
  6. joule (J)
  7. 640
  8. 600
  9. 2
  10. through a distance
  11. 4
  12. no, work stays the same
  13. 390
  14. 500
  15. 80
  16. 360
  17. 3240
  18. 50
  19. 2
  20. 150
  21. 550
  22. 100
  23. 650
  24. 260
  25. 250
  26. 7
  27. 40
  28. 4
  29. 800
  30. 460
  31. 3
  32. 30
  33. 810
  34. 440
  35. 8
  36. 510
  37. load ÷ effort
  38. 3690
  39. 400
  40. 5

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