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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 302 · 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 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  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.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?
  9. 9.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  10. 10.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  14. 14.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  15. 15.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  18. 18.🏋️ A force of 130 N did 1170 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 4 m took 1360 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  27. 27.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  28. 28.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 320 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?

Answer key

  1. 120
  2. 2
  3. 4
  4. 2080
  5. 800
  6. no, work stays the same
  7. 2
  8. 10
  9. through a distance
  10. 900
  11. 290
  12. 200
  13. 1
  14. less effort
  15. 1560
  16. 60
  17. load ÷ effort
  18. 9
  19. 4
  20. 380
  21. 50
  22. 300
  23. 6
  24. 340
  25. 500
  26. 150
  27. joule (J)
  28. 320
  29. 160
  30. 3
  31. 20
  32. 200
  33. 1200
  34. 1280
  35. 3
  36. 1500
  37. 5
  38. 250
  39. 3
  40. 5

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