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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 106 · 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 6 m took 180 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  3. 3.🏋️ 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)
  4. 4.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?
  10. 10.🏋️ 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?
  11. 11.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  12. 12.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 290 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  25. 25.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  26. 26.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 5 m took 1150 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 2 m took 340 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  31. 31.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  33. 33.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 90 N did 540 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 30
  2. load ÷ effort
  3. 250
  4. 210
  5. 2
  6. 850
  7. 800
  8. 1680
  9. 3
  10. 600
  11. less effort
  12. 2
  13. 3330
  14. 3840
  15. 500
  16. no, work stays the same
  17. 400
  18. 300
  19. 550
  20. 330
  21. 7
  22. 430
  23. 2320
  24. joule (J)
  25. 4
  26. 220
  27. 6
  28. 230
  29. 170
  30. 10
  31. 10
  32. 390
  33. 640
  34. 5
  35. 300
  36. 950
  37. 3120
  38. 6
  39. 2
  40. 550

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