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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 706 · 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 force of 310 N did 3100 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 130 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  9. 9.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  12. 12.🏋️ 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?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  14. 14.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  15. 15.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  17. 17.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  18. 18.🏋️ A 12 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.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  21. 21.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 50 N did 400 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 490 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 490 N did 4900 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 240 N did 2400 J of work. How many metres did the object move?
  38. 38.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  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.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?

Answer key

  1. 10
  2. 850
  3. 110
  4. 1170
  5. 190
  6. 650
  7. 250
  8. no, work stays the same
  9. 150
  10. 200
  11. load ÷ effort
  12. 130
  13. through a distance
  14. joule (J)
  15. 2
  16. 10
  17. less effort
  18. 360
  19. 2
  20. 60
  21. 60
  22. 340
  23. 8
  24. 2940
  25. 650
  26. 10
  27. 1190
  28. 4
  29. 210
  30. 850
  31. 1000
  32. 5
  33. 3
  34. 600
  35. 2030
  36. 4
  37. 10
  38. 750
  39. 420
  40. 2

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