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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 685 · 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.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  2. 2.🏋️ A force of 400 N pushes a cart 10 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 160 N pushes a cart 1 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  9. 9.🏋️ 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?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  11. 11.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  14. 14.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  15. 15.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A 13 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  21. 21.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 8 m took 1040 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 430 N pushes a cart 7 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 16 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 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 340 N did 2040 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 9 m took 90 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 10 m took 1900 J of work. What force was used, in newtons?

Answer key

  1. no, work stays the same
  2. 4000
  3. 300
  4. 2
  5. 8
  6. 190
  7. 160
  8. load ÷ effort
  9. 260
  10. less effort
  11. 280
  12. 6
  13. 400
  14. joule (J)
  15. 50
  16. 390
  17. 800
  18. 520
  19. 300
  20. through a distance
  21. 500
  22. 2
  23. 1680
  24. 260
  25. 130
  26. 80
  27. 3010
  28. 160
  29. 680
  30. 800
  31. 1
  32. 6
  33. 360
  34. 10
  35. 500
  36. 320
  37. 300
  38. 5
  39. 6
  40. 190

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