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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 6 · 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 longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  2. 2.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  9. 9.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  11. 11.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  16. 16.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  18. 18.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  19. 19.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 5 m took 1650 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  35. 35.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 420 N did 4200 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. less effort
  2. 150
  3. 2
  4. 1100
  5. 2
  6. 90
  7. 740
  8. load ÷ effort
  9. 80
  10. 2
  11. 320
  12. 140
  13. 3000
  14. 1050
  15. 390
  16. 720
  17. 4
  18. joule (J)
  19. 3
  20. 2
  21. 650
  22. 700
  23. 330
  24. 3
  25. 5
  26. 250
  27. 900
  28. 6
  29. 480
  30. 400
  31. 140
  32. 440
  33. 190
  34. no, work stays the same
  35. 130
  36. 5
  37. 10
  38. 450
  39. 4100
  40. 4

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