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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 34 · 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 5 m took 1950 J of work. What force was used, in newtons?
  2. 2.🏋️ 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?
  3. 3.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  15. 15.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  16. 16.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  19. 19.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  21. 21.🏋️ A 7 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ Pushing a crate 9 m took 2790 J of work. What force was used, in newtons?
  23. 23.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 4 m took 1440 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 410 N did 1230 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  38. 38.🏋️ A 15 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 force of 330 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 230 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 390
  2. 420
  3. 190
  4. 50
  5. 2880
  6. 1
  7. 50
  8. 10
  9. 3
  10. 1
  11. 3870
  12. 180
  13. 2
  14. joule (J)
  15. no, work stays the same
  16. 1200
  17. 740
  18. 90
  19. 520
  20. through a distance
  21. 350
  22. 310
  23. 720
  24. 3150
  25. 50
  26. 2250
  27. 360
  28. 6
  29. 60
  30. 4
  31. 4
  32. 3
  33. 8
  34. 300
  35. 230
  36. 2
  37. less effort
  38. 300
  39. 660
  40. 1150

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