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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 560 · 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 5 m took 800 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 9 m took 1350 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  9. 9.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  12. 12.🏋️ Pushing a crate 4 m took 1400 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  17. 17.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  21. 21.🏋️ Pushing a crate 1 m took 380 J of work. What force was used, in newtons?
  22. 22.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  23. 23.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  31. 31.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 200 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A 12 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. 160
  2. 10
  3. 1
  4. 150
  5. 70
  6. 3
  7. 5
  8. through a distance
  9. 130
  10. 750
  11. load ÷ effort
  12. 350
  13. 2
  14. 120
  15. 1000
  16. less effort
  17. 1080
  18. 250
  19. 250
  20. joule (J)
  21. 380
  22. no, work stays the same
  23. 3
  24. 90
  25. 650
  26. 450
  27. 600
  28. 2
  29. 190
  30. 1
  31. 540
  32. 3
  33. 6
  34. 1800
  35. 550
  36. 5
  37. 3
  38. 460
  39. 2
  40. 240

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