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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 874 · 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 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  3. 3.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 270 N pushes a cart 4 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 170 N did 1700 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  13. 13.🏋️ 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?
  14. 14.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 120 N did 720 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 480 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ 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)
  22. 22.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  25. 25.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 2 m took 400 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 430 N did 3440 J of work. How many metres did the object move?
  29. 29.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  30. 30.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 7 m took 2170 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 10 m took 4800 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 450
  2. load ÷ effort
  3. 5
  4. 1080
  5. 10
  6. 9
  7. 240
  8. 10
  9. 4
  10. 550
  11. 6
  12. through a distance
  13. 120
  14. 3
  15. 5
  16. 4
  17. 2340
  18. 2
  19. 6
  20. 4320
  21. 700
  22. 6
  23. 3
  24. no, work stays the same
  25. 7
  26. 210
  27. 200
  28. 8
  29. less effort
  30. 810
  31. 60
  32. 310
  33. 2
  34. 800
  35. 4
  36. 6
  37. 480
  38. 240
  39. 330
  40. 400

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