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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 519 · 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 70 N did 560 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?
  3. 3.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ 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?
  6. 6.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  9. 9.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) only upwards (d) without moving it
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  13. 13.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ 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?
  15. 15.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  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 machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 290 N did 1740 J of work. How many metres did the object move?
  19. 19.🏋️ 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)
  20. 20.🏋️ Pushing a crate 3 m took 60 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 5 m took 300 J of work. What force was used, in newtons?
  22. 22.🏋️ 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?
  23. 23.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 1 m took 390 J of work. What force was used, in newtons?
  31. 31.🏋️ A 3 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 smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  39. 39.🏋️ A force of 180 N did 180 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?

Answer key

  1. 8
  2. 250
  3. 650
  4. 150
  5. 170
  6. 5
  7. 4
  8. no, work stays the same
  9. through a distance
  10. 140
  11. 1080
  12. joule (J)
  13. 4
  14. 760
  15. 2
  16. 120
  17. 4
  18. 6
  19. 300
  20. 20
  21. 60
  22. 200
  23. 3
  24. 5
  25. 4
  26. 2
  27. 1720
  28. 3900
  29. 400
  30. 390
  31. 90
  32. 750
  33. 40
  34. 1000
  35. 2
  36. 250
  37. 660
  38. load ÷ effort
  39. 1
  40. 7

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