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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 884 · 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 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  5. 5.🏋️ 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)
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  7. 7.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  10. 10.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 8 m took 320 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 450 N did 2700 J of work. How many metres did the object move?
  13. 13.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  14. 14.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  18. 18.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 150 N did 450 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  23. 23.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 4 m took 880 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 350 N did 3150 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 800
  2. 3
  3. 2
  4. load ÷ effort
  5. 50
  6. no, work stays the same
  7. 800
  8. 3
  9. joule (J)
  10. 430
  11. 40
  12. 6
  13. less effort
  14. 200
  15. 320
  16. 5
  17. 1
  18. 800
  19. 210
  20. 3
  21. 4
  22. 240
  23. through a distance
  24. 700
  25. 90
  26. 4
  27. 140
  28. 6
  29. 6
  30. 3
  31. 3
  32. 330
  33. 220
  34. 10
  35. 3
  36. 3900
  37. 9
  38. 5
  39. 1050
  40. 650

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