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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 802 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  2. 2.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  4. 4.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 7 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 smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  13. 13.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  17. 17.🏋️ 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?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  19. 19.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 10 m took 4100 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 390 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  40. 40.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. joule (J)
  2. 3
  3. no, work stays the same
  4. 4
  5. 3
  6. 900
  7. 350
  8. 800
  9. 4
  10. 3240
  11. 2
  12. through a distance
  13. 340
  14. 370
  15. 9
  16. 490
  17. 90
  18. load ÷ effort
  19. 90
  20. 410
  21. 400
  22. 3
  23. 50
  24. 900
  25. 3120
  26. 3
  27. 3
  28. 40
  29. 4
  30. 700
  31. 3
  32. 2160
  33. 390
  34. 2
  35. 4
  36. 20
  37. 6
  38. 2
  39. 270
  40. 480

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