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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 916 · 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 16 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 longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  3. 3.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 390 N did 3900 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  7. 7.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 400 N did 400 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  14. 14.🏋️ A 3 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.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  16. 16.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  17. 17.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  18. 18.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
  20. 20.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  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 1 m took 110 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 360 N did 3240 J of work. How many metres did the object move?
  25. 25.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  26. 26.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  28. 28.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A force of 280 N pushes a cart 6 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 6 m took 2940 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 500 N pushes a cart 10 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 220 N did 660 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 1 m took 430 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?

Answer key

  1. 640
  2. less effort
  3. 4
  4. 10
  5. 460
  6. load ÷ effort
  7. 4
  8. 140
  9. 900
  10. 1
  11. 320
  12. 10
  13. no, work stays the same
  14. 150
  15. 1
  16. through a distance
  17. 170
  18. 390
  19. 210
  20. 50
  21. 90
  22. 110
  23. 2450
  24. 9
  25. joule (J)
  26. 280
  27. 120
  28. 600
  29. 1680
  30. 280
  31. 490
  32. 5000
  33. 50
  34. 5
  35. 280
  36. 450
  37. 3
  38. 1250
  39. 430
  40. 3

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