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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 294 · 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 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 5 m took 450 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 160 N did 960 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 460 N did 460 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 10 m took 3700 J of work. What force was used, in newtons?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  11. 11.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ 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)
  16. 16.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ 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)
  18. 18.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 7 m took 770 J of work. What force was used, in newtons?
  20. 20.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  23. 23.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  26. 26.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  27. 27.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  28. 28.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  29. 29.🏋️ 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?
  30. 30.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 10 m took 2400 J of work. What force was used, in newtons?
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 160 N did 1280 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ 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?

Answer key

  1. 250
  2. 4
  3. 460
  4. 50
  5. 90
  6. 6
  7. 1
  8. 3
  9. 370
  10. load ÷ effort
  11. 4
  12. 1820
  13. 180
  14. 900
  15. 650
  16. 1410
  17. 900
  18. 3
  19. 110
  20. 600
  21. 850
  22. through a distance
  23. 6
  24. 900
  25. no, work stays the same
  26. 300
  27. less effort
  28. joule (J)
  29. 90
  30. 3
  31. 240
  32. 200
  33. 8
  34. 6
  35. 4
  36. 850
  37. 190
  38. 150
  39. 420
  40. 80

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