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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 158 · 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 480 N did 1440 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 8 m took 2640 J of work. What force was used, in newtons?
  3. 3.🏋️ A longer ramp to the same height needs … (a) more effort (b) less effort (c) no effort (d) the same effort
  4. 4.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  8. 8.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 5 m took 2200 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  15. 15.🏋️ Pushing a crate 5 m took 800 J of work. What force was used, in newtons?
  16. 16.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
  18. 18.🏋️ 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?
  19. 19.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  20. 20.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  22. 22.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  24. 24.🏋️ 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)
  25. 25.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 9 m took 3870 J of work. What force was used, in newtons?
  29. 29.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 150 N did 150 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 3
  2. 330
  3. less effort
  4. 320
  5. 6
  6. 760
  7. joule (J)
  8. 450
  9. 2
  10. 100
  11. 160
  12. 440
  13. 5
  14. load ÷ effort
  15. 160
  16. 60
  17. 280
  18. 450
  19. through a distance
  20. 20
  21. no, work stays the same
  22. 800
  23. 1
  24. 600
  25. 100
  26. 170
  27. 430
  28. 430
  29. 40
  30. 240
  31. 1
  32. 1000
  33. 550
  34. 500
  35. 1920
  36. 4
  37. 500
  38. 2
  39. 1000
  40. 350

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