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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 642 · 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.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  2. 2.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  7. 7.🏋️ A force of 380 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  11. 11.🏋️ 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)
  12. 12.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  15. 15.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 10 N did 80 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 7 m took 350 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 3 m took 1350 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 6 m took 120 J of work. What force was used, in newtons?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  26. 26.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  28. 28.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 500 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  36. 36.🏋️ 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)
  37. 37.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?

Answer key

  1. 150
  2. 500
  3. 240
  4. 450
  5. 700
  6. through a distance
  7. 3420
  8. joule (J)
  9. 900
  10. less effort
  11. 150
  12. 1380
  13. 3
  14. 6
  15. 360
  16. 8
  17. 150
  18. 2250
  19. 50
  20. 20
  21. 450
  22. 20
  23. 100
  24. 300
  25. load ÷ effort
  26. 3
  27. 130
  28. 260
  29. 340
  30. 420
  31. 1000
  32. 10
  33. 280
  34. 50
  35. 440
  36. 250
  37. 3
  38. 230
  39. 1900
  40. 8

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