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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 380 · 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 force of 370 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  8. 8.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  9. 9.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 410 N did 4100 J of work. How many metres did the object move?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  25. 25.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  28. 28.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  31. 31.🏋️ 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)
  32. 32.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 370
  2. 4
  3. 100
  4. 6
  5. joule (J)
  6. load ÷ effort
  7. less effort
  8. through a distance
  9. 1410
  10. 360
  11. 300
  12. 240
  13. 2
  14. 2
  15. 310
  16. 4
  17. 30
  18. 20
  19. 2
  20. 7
  21. 60
  22. 1150
  23. 10
  24. no, work stays the same
  25. 3
  26. 150
  27. 500
  28. 600
  29. 70
  30. 1
  31. 250
  32. 600
  33. 4
  34. 680
  35. 3
  36. 70
  37. 10
  38. 220
  39. 2940
  40. 480

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