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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 420 · 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 230 N did 920 J of work. How many metres did the object move?
  2. 2.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  3. 3.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 10 m took 2000 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  9. 9.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  14. 14.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ 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?
  20. 20.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 380 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 290 N did 1160 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 360 N did 2520 J of work. How many metres did the object move?

Answer key

  1. 4
  2. through a distance
  3. 6
  4. 200
  5. 120
  6. 380
  7. 3920
  8. load ÷ effort
  9. 7
  10. 250
  11. 270
  12. 150
  13. 1980
  14. joule (J)
  15. 850
  16. 460
  17. 120
  18. 6
  19. 40
  20. 3
  21. 100
  22. 550
  23. 1520
  24. 6
  25. 1
  26. 2
  27. 6
  28. 5
  29. 750
  30. 120
  31. 8
  32. 2
  33. 800
  34. 3430
  35. less effort
  36. 3
  37. 360
  38. 5
  39. 4
  40. 7

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