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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 625 · 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.

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  1. 1.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  6. 6.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  8. 8.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  10. 10.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
  11. 11.🏋️ 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)
  12. 12.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  17. 17.🏋️ 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)
  18. 18.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A 7 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 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 8 m took 1200 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  28. 28.🏋️ 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?
  29. 29.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
  30. 30.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?

Answer key

  1. 4
  2. 80
  3. 5
  4. 3
  5. joule (J)
  6. 150
  7. no, work stays the same
  8. 500
  9. load ÷ effort
  10. 240
  11. 850
  12. 200
  13. 1760
  14. 60
  15. 2
  16. through a distance
  17. 750
  18. 6
  19. 70
  20. 90
  21. 210
  22. 1350
  23. 200
  24. 150
  25. 2
  26. 160
  27. less effort
  28. 600
  29. 8
  30. 220
  31. 4
  32. 150
  33. 100
  34. 5
  35. 9
  36. 4
  37. 210
  38. 500
  39. 2
  40. 2

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