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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 460 · 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 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?
  2. 2.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ 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?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 110 N did 660 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  8. 8.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  9. 9.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  13. 13.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 10 m took 4800 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ 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?
  18. 18.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  20. 20.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load + effort (d) load × effort
  25. 25.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ 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?
  35. 35.🏋️ Pushing a crate 1 m took 480 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 250 N did 250 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A 16 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. 570
  2. 6
  3. 640
  4. 50
  5. 6
  6. 200
  7. less effort
  8. joule (J)
  9. 450
  10. 470
  11. 500
  12. 2
  13. 5
  14. 480
  15. 30
  16. 450
  17. 160
  18. 6
  19. no, work stays the same
  20. 6
  21. 700
  22. 150
  23. through a distance
  24. load ÷ effort
  25. 320
  26. 6
  27. 10
  28. 950
  29. 60
  30. 900
  31. 5
  32. 200
  33. 650
  34. 600
  35. 480
  36. 1
  37. 1
  38. 2
  39. 110
  40. 320

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