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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 515 · 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 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  3. 3.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  5. 5.🏋️ 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?
  6. 6.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 430 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?
  12. 12.🏋️ 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)
  13. 13.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 400 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  16. 16.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  17. 17.🏋️ Pushing a crate 8 m took 3360 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  24. 24.🏋️ 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?
  25. 25.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  30. 30.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 1 m took 410 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 190 N did 190 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  39. 39.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 10 m took 200 J of work. What force was used, in newtons?

Answer key

  1. 4
  2. load ÷ effort
  3. 1610
  4. 4
  5. 480
  6. 490
  7. 500
  8. 5
  9. 600
  10. 2580
  11. 240
  12. 950
  13. 3
  14. 4000
  15. no, work stays the same
  16. through a distance
  17. 420
  18. 350
  19. 410
  20. 4400
  21. 2
  22. 5
  23. 420
  24. 360
  25. 60
  26. 290
  27. 700
  28. 330
  29. less effort
  30. 2
  31. 450
  32. 6
  33. 410
  34. 5
  35. 1
  36. 4
  37. 100
  38. joule (J)
  39. 6
  40. 20

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