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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 179 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  2. 2.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  7. 7.🏋️ A force of 80 N did 80 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 80 N did 640 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 160 N did 320 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  21. 21.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 4 m took 1040 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 220 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 150 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  34. 34.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 300 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?

Answer key

  1. through a distance
  2. 60
  3. 4
  4. 180
  5. 4
  6. no, work stays the same
  7. 1
  8. 350
  9. 850
  10. 550
  11. 1
  12. 690
  13. 8
  14. 2
  15. 1040
  16. 60
  17. 200
  18. 6
  19. 90
  20. load ÷ effort
  21. 3280
  22. 100
  23. 330
  24. 750
  25. 260
  26. 880
  27. 500
  28. 750
  29. 120
  30. 60
  31. 60
  32. 6
  33. less effort
  34. 20
  35. 120
  36. 6
  37. 5
  38. 2700
  39. 7
  40. 5

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