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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 791 · 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 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 160 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  5. 5.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  6. 6.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 430 N did 4300 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  11. 11.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  13. 13.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  14. 14.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  17. 17.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 5 m took 2150 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  30. 30.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?

Answer key

  1. 4
  2. 1440
  3. 100
  4. 210
  5. less effort
  6. 6
  7. 3
  8. 10
  9. 240
  10. no, work stays the same
  11. 150
  12. 5
  13. through a distance
  14. 360
  15. 900
  16. load ÷ effort
  17. 240
  18. 180
  19. 4
  20. 500
  21. 900
  22. 4700
  23. 430
  24. 430
  25. 2
  26. 140
  27. 1250
  28. 4
  29. joule (J)
  30. 360
  31. 850
  32. 100
  33. 800
  34. 1500
  35. 20
  36. 840
  37. 3000
  38. 2
  39. 250
  40. 6

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