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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 574 · 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.🏋️ 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
  2. 2.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  4. 4.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 350 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  8. 8.🏋️ 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)
  9. 9.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  14. 14.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  15. 15.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 420 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. no, work stays the same
  2. joule (J)
  3. load ÷ effort
  4. 3
  5. 90
  6. 1050
  7. 340
  8. 850
  9. 680
  10. 6
  11. 650
  12. 200
  13. 380
  14. less effort
  15. 2100
  16. 1320
  17. 1
  18. 360
  19. 7
  20. 250
  21. 4
  22. 3
  23. 880
  24. 40
  25. 3
  26. 450
  27. 400
  28. 570
  29. 1050
  30. 700
  31. 8
  32. 350
  33. 4
  34. 850
  35. 1290
  36. 2100
  37. 450
  38. 6
  39. 500
  40. 3

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