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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 325 · 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 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  3. 3.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  6. 6.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ An 18 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 6 m took 960 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  16. 16.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 200 N did 200 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  19. 19.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A force of 280 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  23. 23.🏋️ A force of 450 N did 3600 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  26. 26.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 40 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 300 N did 1500 J of work. How many metres did the object move?
  35. 35.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 2 m took 780 J of work. What force was used, in newtons?
  39. 39.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. 150
  2. no, work stays the same
  3. 440
  4. 450
  5. through a distance
  6. 2
  7. 1300
  8. 1500
  9. 5
  10. 4
  11. 720
  12. 160
  13. 10
  14. 2
  15. less effort
  16. 2
  17. 1
  18. 360
  19. 40
  20. 280
  21. 620
  22. load ÷ effort
  23. 8
  24. 400
  25. joule (J)
  26. 340
  27. 400
  28. 360
  29. 380
  30. 420
  31. 600
  32. 750
  33. 560
  34. 5
  35. 390
  36. 6
  37. 5
  38. 390
  39. 800
  40. 1380

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