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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 470 · 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 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?
  2. 2.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?
  10. 10.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 440 N did 1320 J of work. How many metres did the object move?
  12. 12.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  14. 14.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  16. 16.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 4 m took 1640 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  23. 23.🏋️ A 15 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 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  26. 26.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  27. 27.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  28. 28.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 360 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  35. 35.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  36. 36.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 6 m took 2760 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?

Answer key

  1. 40
  2. 5
  3. 260
  4. 480
  5. 850
  6. 5
  7. 150
  8. 250
  9. 380
  10. 200
  11. 3
  12. 210
  13. 10
  14. 360
  15. through a distance
  16. 5
  17. 60
  18. 2
  19. 380
  20. 410
  21. 1
  22. 2
  23. 600
  24. 120
  25. no, work stays the same
  26. less effort
  27. 3
  28. 260
  29. 370
  30. 2160
  31. 3
  32. 9
  33. 4
  34. 460
  35. joule (J)
  36. 500
  37. 20
  38. 460
  39. 420
  40. 100

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