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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 999 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  2. 2.🏋️ A force of 150 N did 1200 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 310 N did 1240 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ 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
  16. 16.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  20. 20.🏋️ Pushing a crate 6 m took 660 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  23. 23.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?
  24. 24.🏋️ A 13 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 machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 340 N did 2040 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 6 m took 1800 J of work. What force was used, in newtons?
  28. 28.🏋️ A 13 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 5 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 smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 9 m took 2160 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 130 N did 910 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 7 m took 1820 J of work. What force was used, in newtons?
  34. 34.🏋️ 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?
  35. 35.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?

Answer key

  1. joule (J)
  2. 8
  3. 2
  4. 6
  5. 3
  6. 3360
  7. 150
  8. 200
  9. 500
  10. 470
  11. 4
  12. 850
  13. 140
  14. 6
  15. no, work stays the same
  16. 130
  17. 2
  18. 2450
  19. through a distance
  20. 110
  21. 4
  22. load ÷ effort
  23. 10
  24. 130
  25. 6
  26. 6
  27. 300
  28. 260
  29. 50
  30. 150
  31. 240
  32. 7
  33. 260
  34. 180
  35. 5
  36. 10
  37. 300
  38. 750
  39. 630
  40. 3

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