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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 815 · 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 smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 60 N did 420 J of work. How many metres did the object move?
  4. 4.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ 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)
  7. 7.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  14. 14.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  16. 16.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  20. 20.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  22. 22.🏋️ A force of 240 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 460 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 320 N did 640 J of work. How many metres did the object move?
  29. 29.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  30. 30.🏋️ Pushing a crate 10 m took 2000 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 400 N did 3200 J of work. How many metres did the object move?
  35. 35.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) the same effort (d) no effort
  36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  38. 38.🏋️ 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)
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 550
  2. 5
  3. 7
  4. 750
  5. 6
  6. 750
  7. 240
  8. 840
  9. 1
  10. 7
  11. 4
  12. 500
  13. joule (J)
  14. 5
  15. 120
  16. 300
  17. 4
  18. 1
  19. no, work stays the same
  20. 100
  21. through a distance
  22. 1200
  23. 4
  24. 190
  25. 2760
  26. 400
  27. 10
  28. 2
  29. load ÷ effort
  30. 200
  31. 100
  32. 300
  33. 200
  34. 8
  35. less effort
  36. 1000
  37. 50
  38. 200
  39. 200
  40. 1500

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