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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 612 · 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 380 N did 1900 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 2 m took 360 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 40 N did 80 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  7. 7.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 8 m took 2400 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 200 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ 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)
  17. 17.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 10 m took 4300 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  26. 26.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  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 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?
  31. 31.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  33. 33.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 420 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 6 m took 120 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?

Answer key

  1. 5
  2. 180
  3. 7
  4. 2
  5. 2050
  6. through a distance
  7. 4
  8. 350
  9. 1040
  10. 300
  11. 390
  12. 1600
  13. 5
  14. no, work stays the same
  15. 100
  16. 650
  17. 5
  18. load ÷ effort
  19. 700
  20. 3330
  21. 470
  22. 430
  23. 3
  24. 1
  25. 360
  26. less effort
  27. 720
  28. 300
  29. 2400
  30. 600
  31. 1500
  32. joule (J)
  33. 4
  34. 4200
  35. 400
  36. 760
  37. 80
  38. 20
  39. 3
  40. 1

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