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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 946 · 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 machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Pushing a crate 9 m took 3420 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 310 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 410 N did 3280 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  14. 14.🏋️ A force of 390 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Pushing a crate 1 m took 230 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 7 m took 3080 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  24. 24.🏋️ 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
  25. 25.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 160 N pushes a cart 7 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 170 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 9 m took 2610 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 9 m took 3690 J of work. What force was used, in newtons?
  35. 35.🏋️ 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?
  36. 36.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  37. 37.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 30 N did 60 J of work. How many metres did the object move?

Answer key

  1. 3
  2. 400
  3. 380
  4. 3100
  5. 8
  6. 4
  7. 6
  8. 180
  9. 70
  10. 600
  11. 900
  12. 300
  13. through a distance
  14. 1560
  15. 100
  16. 230
  17. 20
  18. 400
  19. 440
  20. 870
  21. 3
  22. 2
  23. less effort
  24. no, work stays the same
  25. 3
  26. 1080
  27. 360
  28. 1120
  29. 680
  30. 10
  31. 6
  32. 600
  33. 290
  34. 410
  35. 180
  36. load ÷ effort
  37. 5
  38. 420
  39. 4
  40. 2

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