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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 385 · 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 430 N did 3440 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 410 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  4. 4.🏋️ A force of 270 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 17 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 force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 460 N did 3680 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  11. 11.🏋️ A 13 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 machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 10 m took 600 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  18. 18.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  20. 20.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 150 N did 1350 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 280 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  29. 29.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 1 m took 250 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 260 N did 520 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 2 m took 900 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 160 N did 960 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?

Answer key

  1. 8
  2. 2870
  3. through a distance
  4. 1620
  5. 510
  6. 240
  7. 8
  8. 120
  9. 90
  10. 1
  11. 520
  12. 3
  13. 130
  14. 80
  15. 60
  16. 5
  17. joule (J)
  18. 70
  19. load ÷ effort
  20. 4
  21. 2
  22. 9
  23. 3
  24. 360
  25. 1120
  26. 120
  27. 6
  28. less effort
  29. 210
  30. 7
  31. 3
  32. 700
  33. 250
  34. 2
  35. 350
  36. 450
  37. 1000
  38. 6
  39. 100
  40. 6

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