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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 478 · 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 longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  2. 2.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  3. 3.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 3 m took 900 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 8 m took 3680 J of work. What force was used, in newtons?
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 120 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  19. 19.🏋️ A 14 kg box is lifted straight up by 5 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) through a distance (b) only upwards (c) very slowly (d) without moving it
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  22. 22.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  25. 25.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 240 N did 1680 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  29. 29.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  30. 30.🏋️ A force of 310 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 440 N did 2200 J of work. How many metres did the object move?
  34. 34.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 200 N did 1600 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?

Answer key

  1. less effort
  2. 90
  3. 570
  4. 20
  5. 9
  6. 180
  7. 230
  8. 920
  9. 4
  10. 120
  11. 300
  12. 7
  13. 7
  14. 460
  15. 420
  16. 120
  17. 280
  18. joule (J)
  19. 700
  20. through a distance
  21. load ÷ effort
  22. 800
  23. 500
  24. 3
  25. 170
  26. 160
  27. 7
  28. 2
  29. no, work stays the same
  30. 1860
  31. 400
  32. 30
  33. 5
  34. 760
  35. 6
  36. 300
  37. 8
  38. 3
  39. 390
  40. 180

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