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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 790 · 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 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  5. 5.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  7. 7.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  8. 8.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 360 N pushes a cart 7 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 4 m took 1760 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 5 m took 1800 J of work. What force was used, in newtons?
  16. 16.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 240 N did 720 J of work. How many metres did the object move?
  19. 19.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 260 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
  29. 29.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 120 N did 1080 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 2
  2. 4
  3. 4
  4. through a distance
  5. 6
  6. joule (J)
  7. less effort
  8. 90
  9. 750
  10. 2520
  11. 4
  12. 500
  13. 440
  14. 2
  15. 360
  16. 240
  17. 6
  18. 3
  19. 600
  20. 180
  21. 3
  22. 2340
  23. 4
  24. 3
  25. 4
  26. 650
  27. 5
  28. 190
  29. 360
  30. 200
  31. 4
  32. 9
  33. 2800
  34. 50
  35. 400
  36. 190
  37. 5
  38. 360
  39. 2450
  40. 950

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