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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 484 · 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 force of 280 N did 1680 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 9 m took 2250 J of work. What force was used, in newtons?
  5. 5.🏋️ A 19 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 machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 380 N pushes a cart 4 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 50 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  11. 11.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  12. 12.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 5 m took 2350 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  22. 22.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  24. 24.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  30. 30.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 350 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 6
  2. 280
  3. 2
  4. 250
  5. 570
  6. 2
  7. 1520
  8. 60
  9. 450
  10. no, work stays the same
  11. through a distance
  12. 60
  13. 200
  14. 90
  15. 50
  16. 470
  17. 2
  18. 230
  19. 950
  20. 460
  21. 2
  22. 160
  23. 9
  24. 190
  25. 4
  26. 950
  27. 450
  28. 200
  29. less effort
  30. 3
  31. 5
  32. 180
  33. 100
  34. 10
  35. 2
  36. 1750
  37. 4
  38. 390
  39. 8
  40. 1280

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