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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 366 · 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 5 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  5. 5.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  6. 6.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  7. 7.🏋️ 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?
  8. 8.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  10. 10.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ 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?
  12. 12.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 9 m took 4320 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?
  16. 16.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 320 N did 1920 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 360 N did 2160 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 30 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 80 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 240 N did 240 J of work. How many metres did the object move?
  38. 38.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  39. 39.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?

Answer key

  1. 200
  2. 600
  3. 750
  4. through a distance
  5. no, work stays the same
  6. 90
  7. 240
  8. 410
  9. load ÷ effort
  10. 6
  11. 160
  12. 4
  13. 480
  14. 250
  15. 330
  16. 550
  17. 6
  18. 10
  19. 6
  20. 960
  21. 350
  22. 4
  23. 850
  24. 30
  25. 3
  26. 350
  27. 3
  28. 100
  29. 5
  30. 760
  31. 560
  32. 320
  33. 800
  34. 280
  35. 230
  36. 650
  37. 1
  38. joule (J)
  39. 3
  40. 7

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