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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 448 · 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 430 N did 1290 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 160 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  8. 8.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  9. 9.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  12. 12.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 290 N pushes a cart 8 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 360 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  20. 20.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  21. 21.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 140 N did 980 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
  27. 27.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  28. 28.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 300 N did 2700 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 180 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 6 m took 1080 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 3
  2. 5
  3. 350
  4. 1120
  5. 220
  6. 150
  7. load ÷ effort
  8. no, work stays the same
  9. 190
  10. 1380
  11. 9
  12. 3
  13. 2320
  14. 650
  15. 2
  16. 400
  17. 1
  18. 2880
  19. through a distance
  20. joule (J)
  21. 300
  22. 7
  23. 8
  24. 300
  25. 720
  26. 350
  27. less effort
  28. 1260
  29. 2
  30. 320
  31. 9
  32. 1620
  33. 500
  34. 80
  35. 10
  36. 5
  37. 850
  38. 180
  39. 60
  40. 160

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