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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 350 · 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 machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 100 N did 100 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  9. 9.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 2 m took 440 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  19. 19.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  21. 21.🏋️ A force of 200 N did 2000 J of work. How many metres did the object move?
  22. 22.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  23. 23.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 6 m took 2700 J of work. What force was used, in newtons?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  32. 32.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 13 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 4 m took 200 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. 290
  3. 800
  4. 1
  5. 6
  6. 150
  7. 3150
  8. less effort
  9. 50
  10. 1
  11. 4900
  12. 150
  13. 4
  14. 400
  15. 220
  16. 6
  17. 120
  18. joule (J)
  19. 1000
  20. no, work stays the same
  21. 10
  22. through a distance
  23. 390
  24. 390
  25. 2
  26. 450
  27. 500
  28. 3
  29. 2
  30. 2
  31. 380
  32. 50
  33. 2
  34. 130
  35. 400
  36. 50
  37. 6
  38. 650
  39. 4
  40. 5

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