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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 648 · 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 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  16. 16.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  18. 18.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 380 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  23. 23.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  24. 24.🏋️ Pushing a crate 3 m took 300 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 2 m took 160 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 320 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  36. 36.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  37. 37.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?

Answer key

  1. 2
  2. 1040
  3. 400
  4. 700
  5. 100
  6. 5
  7. 7
  8. less effort
  9. 50
  10. 100
  11. 450
  12. 4
  13. 500
  14. 3
  15. 20
  16. 570
  17. no, work stays the same
  18. 3
  19. 60
  20. 3800
  21. 100
  22. 70
  23. through a distance
  24. 100
  25. 950
  26. 70
  27. 300
  28. 6
  29. 80
  30. 250
  31. 50
  32. 4
  33. 320
  34. 330
  35. joule (J)
  36. load ÷ effort
  37. 490
  38. 5
  39. 90
  40. 270

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