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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 528 · 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 16 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.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  3. 3.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 2 m took 520 J of work. What force was used, in newtons?
  11. 11.🏋️ 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?
  12. 12.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 3 m took 150 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  16. 16.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  18. 18.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  21. 21.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  22. 22.🏋️ 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?
  23. 23.🏋️ Pushing a crate 4 m took 1320 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  25. 25.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  27. 27.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  29. 29.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 9 m took 1080 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 6 m took 300 J of work. What force was used, in newtons?
  40. 40.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays

Answer key

  1. 640
  2. through a distance
  3. 5
  4. 5
  5. 3010
  6. 350
  7. 3400
  8. 460
  9. 400
  10. 260
  11. 760
  12. 6
  13. 150
  14. 50
  15. 440
  16. 750
  17. joule (J)
  18. 800
  19. 8
  20. 70
  21. less effort
  22. 140
  23. 330
  24. 30
  25. 720
  26. load ÷ effort
  27. 10
  28. 4
  29. 280
  30. 160
  31. 900
  32. 950
  33. 370
  34. 2
  35. 540
  36. 2
  37. 2
  38. 120
  39. 50
  40. no, work stays the same

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