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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 272 · 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.

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  1. 1.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  8. 8.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 260 N did 2080 J of work. How many metres did the object move?
  13. 13.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  17. 17.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  21. 21.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 4 m took 1960 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 6 m took 2820 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 330 N did 1650 J of work. How many metres did the object move?
  32. 32.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 2 m took 80 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 4 m took 800 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 40 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. 50
  3. 2100
  4. 4400
  5. 950
  6. through a distance
  7. load ÷ effort
  8. 1
  9. 950
  10. 640
  11. 250
  12. 8
  13. 280
  14. 1160
  15. 280
  16. joule (J)
  17. 350
  18. 2
  19. 300
  20. no, work stays the same
  21. 5
  22. 400
  23. 200
  24. 3
  25. 2
  26. 490
  27. 470
  28. 8
  29. 1760
  30. 600
  31. 5
  32. 720
  33. 6
  34. 40
  35. 200
  36. 240
  37. 1280
  38. 3
  39. 680
  40. 6

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