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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 783 · 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 4 m took 960 J of work. What force was used, in newtons?
  2. 2.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  3. 3.🏋️ 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?
  4. 4.🏋️ An 11 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 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 6 m took 360 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  16. 16.🏋️ A 6 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.🏋️ 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
  18. 18.🏋️ A force of 70 N did 280 J of work. How many metres did the object move?
  19. 19.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 90 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 60 N did 360 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  29. 29.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 10 m took 4700 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ 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?
  39. 39.🏋️ 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)
  40. 40.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. 240
  2. less effort
  3. 40
  4. 330
  5. 120
  6. 90
  7. 60
  8. 30
  9. 350
  10. 850
  11. 6
  12. 2
  13. 2
  14. 500
  15. load ÷ effort
  16. 60
  17. no, work stays the same
  18. 4
  19. 950
  20. 3870
  21. 500
  22. 810
  23. 860
  24. 900
  25. 6
  26. 180
  27. 350
  28. through a distance
  29. 9
  30. 470
  31. 5
  32. 2
  33. 10
  34. 1050
  35. 140
  36. 140
  37. 100
  38. 20
  39. 500
  40. 4

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