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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 932 · 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 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  3. 3.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  6. 6.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
  8. 8.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 6 m took 2160 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 280 N did 1680 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  16. 16.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ 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?
  22. 22.🏋️ Pushing a crate 8 m took 1360 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  27. 27.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  28. 28.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 9 m took 2880 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 130 N did 1170 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 9 m took 3420 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 80 N did 400 J of work. How many metres did the object move?
  38. 38.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?

Answer key

  1. 400
  2. 4
  3. 10
  4. 4
  5. through a distance
  6. 4
  7. 210
  8. 130
  9. 360
  10. 6
  11. 4
  12. 100
  13. 6
  14. 3
  15. no, work stays the same
  16. 1020
  17. 2
  18. 40
  19. 1000
  20. 200
  21. 90
  22. 170
  23. 90
  24. 3
  25. 510
  26. 180
  27. less effort
  28. 100
  29. 320
  30. 800
  31. 9
  32. 350
  33. 3
  34. 1320
  35. 380
  36. 3
  37. 5
  38. 800
  39. 420
  40. 340

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