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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 95 · 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  2. 2.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  6. 6.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  7. 7.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  8. 8.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  9. 9.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  11. 11.🏋️ 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?
  12. 12.🏋️ Pushing a crate 5 m took 1950 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 480 N did 1920 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 460 N pushes a cart 6 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  23. 23.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 180 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 270 N did 1080 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 8 m took 960 J of work. What force was used, in newtons?
  34. 34.🏋️ 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?
  35. 35.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 6 m took 1800 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 190 N did 1900 J of work. How many metres did the object move?

Answer key

  1. load ÷ effort
  2. 3520
  3. 360
  4. 6
  5. less effort
  6. 9
  7. no, work stays the same
  8. 1
  9. 300
  10. through a distance
  11. 80
  12. 390
  13. 4
  14. 5
  15. 2760
  16. 20
  17. 900
  18. 190
  19. 350
  20. 2
  21. 5
  22. 460
  23. 5
  24. 2800
  25. 1080
  26. 6
  27. 600
  28. 80
  29. 5
  30. 80
  31. 4
  32. 4
  33. 120
  34. 800
  35. 3
  36. 200
  37. 300
  38. 230
  39. 170
  40. 10

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