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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 335 · 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 360 N did 2520 J of work. How many metres did the object move?
  2. 2.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 10 m took 800 J of work. What force was used, in newtons?
  9. 9.🏋️ 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?
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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
  13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  14. 14.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 6 m took 780 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  19. 19.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 60 N did 300 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  32. 32.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  33. 33.🏋️ Pushing a crate 8 m took 3200 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 4140 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?

Answer key

  1. 7
  2. 40
  3. 950
  4. 2
  5. 120
  6. 140
  7. 2
  8. 80
  9. 550
  10. less effort
  11. 750
  12. no, work stays the same
  13. load ÷ effort
  14. 70
  15. 130
  16. 350
  17. 3
  18. through a distance
  19. 180
  20. 3
  21. 120
  22. 90
  23. 300
  24. 2
  25. 5
  26. 3
  27. 510
  28. 350
  29. 120
  30. 5
  31. 270
  32. joule (J)
  33. 400
  34. 950
  35. 4
  36. 9
  37. 300
  38. 520
  39. 460
  40. 210

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