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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 98 · 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 3 m took 1200 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  3. 3.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ 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?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  10. 10.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  12. 12.🏋️ A 10 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.🏋️ Pushing a crate 2 m took 460 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 4 m took 1280 J of work. What force was used, in newtons?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  18. 18.🏋️ A force of 480 N did 480 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 230 N did 460 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  22. 22.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 6 m took 1800 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 3 m took 1290 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  31. 31.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  32. 32.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 400
  2. 30
  3. 570
  4. 490
  5. 180
  6. 250
  7. 160
  8. 600
  9. load ÷ effort
  10. 450
  11. 8
  12. 100
  13. 230
  14. 5
  15. 700
  16. 320
  17. no, work stays the same
  18. 1
  19. 2
  20. 1000
  21. through a distance
  22. 150
  23. 150
  24. 140
  25. 2
  26. 300
  27. 430
  28. 200
  29. 5
  30. joule (J)
  31. less effort
  32. 3
  33. 300
  34. 2
  35. 960
  36. 1440
  37. 500
  38. 600
  39. 950
  40. 20

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