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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 110 · 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.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  3. 3.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  4. 4.🏋️ 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?
  5. 5.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 8 m took 3040 J of work. What force was used, in newtons?
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  8. 8.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 210 N pushes a cart 4 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  16. 16.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  17. 17.🏋️ A force of 280 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  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.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  24. 24.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  28. 28.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 10 m took 3200 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ Pushing a crate 4 m took 400 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 470 N pushes a cart 10 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 20 N did 20 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 7 m took 2520 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 470
  2. no, work stays the same
  3. less effort
  4. 150
  5. 3
  6. 380
  7. through a distance
  8. 2
  9. 390
  10. 440
  11. 200
  12. 840
  13. 3
  14. 7
  15. load ÷ effort
  16. joule (J)
  17. 2520
  18. 5
  19. 360
  20. 110
  21. 300
  22. 140
  23. 3
  24. 650
  25. 4
  26. 560
  27. 10
  28. 170
  29. 2160
  30. 320
  31. 560
  32. 260
  33. 100
  34. 450
  35. 4700
  36. 1
  37. 50
  38. 360
  39. 2
  40. 100

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