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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 820 · 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 160 N pushes a cart 7 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  4. 4.🏋️ Pushing a crate 4 m took 1840 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  7. 7.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  8. 8.🏋️ A force of 310 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ 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)
  13. 13.🏋️ A force of 360 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 3 m took 480 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 5 m took 1500 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 1 m took 440 J of work. What force was used, in newtons?
  28. 28.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  29. 29.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ 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)
  32. 32.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 480 N did 3360 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 10 N did 10 J of work. How many metres did the object move?

Answer key

  1. 1120
  2. 2
  3. load ÷ effort
  4. 460
  5. 5
  6. no, work stays the same
  7. through a distance
  8. 310
  9. 60
  10. 400
  11. 900
  12. 250
  13. 2160
  14. 5
  15. 1480
  16. 100
  17. 160
  18. 2
  19. 3
  20. 300
  21. 20
  22. 4
  23. 130
  24. 1040
  25. 2
  26. 440
  27. 440
  28. joule (J)
  29. 2
  30. 3
  31. 700
  32. 190
  33. 3
  34. 4
  35. 340
  36. 1540
  37. 470
  38. 7
  39. 1620
  40. 1

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