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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 213 · 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 machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  6. 6.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 6 m took 180 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  14. 14.🏋️ A force of 240 N did 2160 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ 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)
  18. 18.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  19. 19.🏋️ Pushing a crate 4 m took 760 J of work. What force was used, in newtons?
  20. 20.🏋️ 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?
  21. 21.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 470 N did 2350 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 290 N did 870 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 10 m took 600 J of work. What force was used, in newtons?
  25. 25.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  26. 26.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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?
  32. 32.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  35. 35.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  37. 37.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ 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
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. 650
  3. 2
  4. 140
  5. 2
  6. 3
  7. 70
  8. 170
  9. 320
  10. 1300
  11. 350
  12. 30
  13. joule (J)
  14. 9
  15. 3290
  16. 240
  17. 400
  18. load ÷ effort
  19. 190
  20. 130
  21. 60
  22. 5
  23. 3
  24. 60
  25. through a distance
  26. 270
  27. 520
  28. 70
  29. 200
  30. 650
  31. 420
  32. 100
  33. 1000
  34. less effort
  35. 280
  36. 460
  37. 480
  38. no, work stays the same
  39. 550
  40. 2

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