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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 57 · 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 machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  3. 3.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  8. 8.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  9. 9.🏋️ Pushing a crate 7 m took 2870 J of work. What force was used, in newtons?
  10. 10.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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?
  13. 13.🏋️ A force of 20 N did 180 J of work. How many metres did the object move?
  14. 14.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  15. 15.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  21. 21.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 30 N did 120 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 290 N pushes a cart 9 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ 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
  39. 39.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. 2
  3. 360
  4. 360
  5. 4
  6. 1050
  7. 9
  8. through a distance
  9. 410
  10. less effort
  11. 350
  12. 120
  13. 9
  14. joule (J)
  15. 3
  16. 620
  17. 5
  18. 2
  19. 200
  20. load ÷ effort
  21. 430
  22. 4
  23. 3
  24. 400
  25. 4
  26. 120
  27. 9
  28. 600
  29. 3
  30. 680
  31. 2610
  32. 650
  33. 100
  34. 500
  35. 10
  36. 7
  37. 800
  38. no, work stays the same
  39. 4
  40. 6

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