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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 120 · 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.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  2. 2.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  8. 8.🏋️ A force of 440 N did 2640 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 110 N did 110 J of work. How many metres did the object move?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  13. 13.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  15. 15.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  16. 16.🏋️ 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?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  18. 18.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 400 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 150 N did 750 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  26. 26.🏋️ 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?
  27. 27.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  28. 28.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  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 force of 220 N did 1100 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 500 N did 2500 J of work. How many metres did the object move?
  38. 38.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?

Answer key

  1. 480
  2. 9
  3. 60
  4. 2
  5. 330
  6. 240
  7. no, work stays the same
  8. 6
  9. 3
  10. 150
  11. 1
  12. load ÷ effort
  13. 360
  14. 7
  15. less effort
  16. 320
  17. joule (J)
  18. 4
  19. 4000
  20. 470
  21. 1
  22. 100
  23. 10
  24. 5
  25. 450
  26. 160
  27. through a distance
  28. 1820
  29. 2400
  30. 1
  31. 850
  32. 1
  33. 4
  34. 5
  35. 390
  36. 5
  37. 5
  38. 380
  39. 170
  40. 410

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