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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 807 · 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 2 m took 880 J of work. What force was used, in newtons?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  3. 3.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  5. 5.🏋️ Pushing a crate 8 m took 3840 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  8. 8.🏋️ Pushing a crate 4 m took 1680 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ Pushing a crate 3 m took 630 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 10 m took 400 J of work. What force was used, in newtons?
  20. 20.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  21. 21.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  22. 22.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  23. 23.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 500 N did 2500 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  31. 31.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 160 N did 1440 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 270 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. 440
  2. no, work stays the same
  3. 1000
  4. load ÷ effort
  5. 480
  6. 900
  7. less effort
  8. 420
  9. 1000
  10. 360
  11. 2
  12. 4
  13. 2
  14. 2
  15. 920
  16. 180
  17. 210
  18. 90
  19. 40
  20. joule (J)
  21. through a distance
  22. 1
  23. 200
  24. 5
  25. 6
  26. 650
  27. 600
  28. 350
  29. 960
  30. 380
  31. 120
  32. 200
  33. 20
  34. 9
  35. 3
  36. 3960
  37. 1000
  38. 290
  39. 2520
  40. 1890

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