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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 663 · 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 machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  3. 3.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  4. 4.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ 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?
  6. 6.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  10. 10.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  13. 13.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  22. 22.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 50 N did 500 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ 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?
  34. 34.🏋️ 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?
  35. 35.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  40. 40.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 3
  2. 3
  3. less effort
  4. 1080
  5. 160
  6. 700
  7. 4
  8. 4
  9. no, work stays the same
  10. 2
  11. 5
  12. through a distance
  13. 5
  14. 400
  15. 120
  16. 400
  17. 130
  18. 200
  19. 4
  20. 550
  21. load ÷ effort
  22. 130
  23. 2160
  24. 430
  25. 350
  26. 1520
  27. 630
  28. 40
  29. 2
  30. 10
  31. 4
  32. 850
  33. 570
  34. 390
  35. 680
  36. 370
  37. 3900
  38. 210
  39. 380
  40. 80

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