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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 104 · 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 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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?
  4. 4.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  6. 6.🏋️ A force of 160 N did 320 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 210 N did 1260 J of work. How many metres did the object move?
  11. 11.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 250 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ 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)
  27. 27.🏋️ Pushing a crate 9 m took 3420 J of work. What force was used, in newtons?
  28. 28.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  29. 29.🏋️ 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?
  30. 30.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  34. 34.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  36. 36.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?

Answer key

  1. 2
  2. 270
  3. 200
  4. joule (J)
  5. load ÷ effort
  6. 2
  7. 140
  8. 60
  9. 470
  10. 6
  11. 410
  12. 250
  13. 550
  14. 1250
  15. 20
  16. 6
  17. 540
  18. 390
  19. 1380
  20. 400
  21. 9
  22. 100
  23. 330
  24. 60
  25. 1880
  26. 900
  27. 380
  28. through a distance
  29. 140
  30. 2
  31. 450
  32. 450
  33. 3
  34. 380
  35. no, work stays the same
  36. 3
  37. 430
  38. 150
  39. 300
  40. 4

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