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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 751 · 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 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  6. 6.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  9. 9.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  10. 10.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  12. 12.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 160 N did 800 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 270 N pushes a cart 10 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ 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?
  24. 24.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  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 7 m took 2380 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 280 N did 1680 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?

Answer key

  1. 120
  2. 2
  3. 560
  4. 3
  5. through a distance
  6. 5
  7. 4
  8. 1
  9. less effort
  10. 6
  11. load ÷ effort
  12. 190
  13. joule (J)
  14. no, work stays the same
  15. 6
  16. 350
  17. 5
  18. 370
  19. 6
  20. 160
  21. 2700
  22. 6
  23. 150
  24. 2
  25. 270
  26. 400
  27. 6
  28. 3400
  29. 230
  30. 400
  31. 850
  32. 340
  33. 1000
  34. 7
  35. 1920
  36. 850
  37. 6
  38. 1890
  39. 4
  40. 2

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