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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 400 · 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 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 2 m took 380 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  8. 8.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  13. 13.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  15. 15.🏋️ 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)
  16. 16.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 440 N did 3080 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 460 N did 3680 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  32. 32.🏋️ 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?
  33. 33.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 3
  2. 2
  3. 3
  4. 190
  5. 80
  6. no, work stays the same
  7. through a distance
  8. 2280
  9. 720
  10. 6
  11. 750
  12. less effort
  13. 1500
  14. joule (J)
  15. 500
  16. 2
  17. 550
  18. 150
  19. 50
  20. 600
  21. 560
  22. 2
  23. 7
  24. 5
  25. 3
  26. 250
  27. 4
  28. 550
  29. 8
  30. 850
  31. 470
  32. 30
  33. 250
  34. 380
  35. 4
  36. 3
  37. 3
  38. 3
  39. 4
  40. 600

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