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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 79 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  2. 2.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  4. 4.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 110 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ 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
  8. 8.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  13. 13.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 90 N did 90 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 2 m took 940 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  26. 26.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 280 N did 1960 J of work. How many metres did the object move?
  32. 32.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  33. 33.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  36. 36.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. joule (J)
  2. 350
  3. through a distance
  4. 4
  5. 660
  6. 400
  7. no, work stays the same
  8. 30
  9. 2
  10. 50
  11. 6
  12. 20
  13. 60
  14. 250
  15. 2000
  16. 1
  17. 50
  18. 200
  19. 470
  20. 4
  21. 9
  22. 350
  23. 390
  24. 240
  25. load ÷ effort
  26. 10
  27. 30
  28. 210
  29. 50
  30. 4000
  31. 7
  32. less effort
  33. 200
  34. 50
  35. 1
  36. 200
  37. 2
  38. 5
  39. 60
  40. 200

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