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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 218 · 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 490 N did 3430 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  8. 8.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  10. 10.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 80 N did 720 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 8 m took 2160 J of work. What force was used, in newtons?
  19. 19.🏋️ A 3 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.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 120 N did 960 J of work. How many metres did the object move?
  22. 22.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 120 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  28. 28.🏋️ A force of 50 N pushes a cart 3 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Pushing a crate 4 m took 40 J of work. What force was used, in newtons?
  33. 33.🏋️ An 11 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.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 260 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 7
  2. 850
  3. 2400
  4. 90
  5. 10
  6. 2
  7. through a distance
  8. 7
  9. 5
  10. 60
  11. 600
  12. load ÷ effort
  13. 480
  14. 210
  15. 20
  16. 9
  17. 320
  18. 270
  19. 120
  20. 620
  21. 8
  22. 350
  23. 230
  24. 450
  25. 200
  26. 840
  27. no, work stays the same
  28. 150
  29. 150
  30. 320
  31. 420
  32. 10
  33. 330
  34. 10
  35. 4
  36. 20
  37. 1560
  38. 40
  39. 240
  40. 150

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