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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 878 · 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 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ 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?
  12. 12.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  13. 13.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  14. 14.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  16. 16.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 340 N did 1700 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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)
  29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ 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?
  36. 36.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 5
  2. 70
  3. 90
  4. 4
  5. 6
  6. 6
  7. 420
  8. 60
  9. 400
  10. 400
  11. 340
  12. less effort
  13. joule (J)
  14. load ÷ effort
  15. through a distance
  16. 100
  17. 4
  18. 4
  19. 3
  20. 5
  21. 300
  22. 5
  23. 5
  24. 200
  25. 4
  26. 80
  27. 480
  28. 900
  29. 800
  30. 2000
  31. 750
  32. 180
  33. 200
  34. 1000
  35. 280
  36. no, work stays the same
  37. 350
  38. 6
  39. 360
  40. 30

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