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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 241 · 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 5 m took 1050 J of work. What force was used, in newtons?
  2. 2.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  3. 3.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  8. 8.🏋️ 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
  9. 9.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  12. 12.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 370 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  18. 18.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  19. 19.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  35. 35.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 10 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 210
  2. less effort
  3. 3
  4. 350
  5. 470
  6. 120
  7. load ÷ effort
  8. no, work stays the same
  9. 800
  10. 4
  11. through a distance
  12. 2
  13. 120
  14. 750
  15. 2220
  16. 390
  17. 40
  18. joule (J)
  19. 4
  20. 420
  21. 1
  22. 5
  23. 600
  24. 3360
  25. 400
  26. 400
  27. 6
  28. 4
  29. 210
  30. 3
  31. 90
  32. 4
  33. 370
  34. 470
  35. 90
  36. 540
  37. 2
  38. 300
  39. 600
  40. 80

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