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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 700 · 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 40 N did 280 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 180 N did 1260 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  9. 9.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  10. 10.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  12. 12.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 9 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 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 40 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  18. 18.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  19. 19.🏋️ A force of 150 N did 900 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 380 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  22. 22.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  23. 23.🏋️ A force of 140 N did 560 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 8 m took 240 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  26. 26.🏋️ 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?
  27. 27.🏋️ 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?
  28. 28.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 3 m took 1080 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 6 m took 420 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ 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?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?

Answer key

  1. 7
  2. 7
  3. 7
  4. 2820
  5. 10
  6. 4100
  7. 200
  8. through a distance
  9. 5
  10. 400
  11. load ÷ effort
  12. 560
  13. 180
  14. 450
  15. 40
  16. 3
  17. 100
  18. joule (J)
  19. 6
  20. 1900
  21. less effort
  22. no, work stays the same
  23. 4
  24. 30
  25. 2
  26. 250
  27. 300
  28. 250
  29. 360
  30. 200
  31. 150
  32. 960
  33. 70
  34. 650
  35. 3
  36. 700
  37. 850
  38. 720
  39. 150
  40. 3

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