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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 989 · 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 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  4. 4.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  5. 5.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  9. 9.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 60 N pushes a cart 3 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 480 N did 2400 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  28. 28.🏋️ 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)
  29. 29.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  34. 34.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  35. 35.🏋️ Pushing a crate 5 m took 1450 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 180
  2. 5
  3. joule (J)
  4. less effort
  5. 6
  6. 4
  7. through a distance
  8. load ÷ effort
  9. 120
  10. 180
  11. 500
  12. 220
  13. 10
  14. 70
  15. 3200
  16. 410
  17. 950
  18. 5
  19. 3840
  20. 80
  21. 50
  22. 180
  23. 5
  24. 320
  25. 200
  26. 8
  27. 3
  28. 250
  29. 6
  30. 2080
  31. 720
  32. 3200
  33. 390
  34. no, work stays the same
  35. 290
  36. 320
  37. 10
  38. 5
  39. 450
  40. 900

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