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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 403 · 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 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  5. 5.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  7. 7.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 10 m took 600 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 180 N did 1440 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 8 m took 3600 J of work. What force was used, in newtons?
  20. 20.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 8 m took 240 J of work. What force was used, in newtons?
  28. 28.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 300 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  32. 32.🏋️ A 2 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 force of 320 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 370 N pushes a cart 9 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 10 m took 1800 J of work. What force was used, in newtons?

Answer key

  1. 6
  2. 700
  3. 6
  4. through a distance
  5. 4
  6. load ÷ effort
  7. 480
  8. 80
  9. 750
  10. 2
  11. 380
  12. 60
  13. 6
  14. 8
  15. 90
  16. 3
  17. 550
  18. 150
  19. 450
  20. 6
  21. 2800
  22. 350
  23. 720
  24. 2
  25. 8
  26. 300
  27. 30
  28. 120
  29. 3000
  30. 260
  31. no, work stays the same
  32. 80
  33. 2880
  34. 360
  35. 4
  36. 300
  37. 360
  38. 2
  39. 3330
  40. 180

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