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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 269 · 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.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  2. 2.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  4. 4.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  5. 5.🏋️ A 10 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 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 270 N did 270 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  10. 10.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  12. 12.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  13. 13.🏋️ Pushing a crate 1 m took 370 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  16. 16.🏋️ A force of 50 N pushes a cart 10 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 5 m took 1300 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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)
  28. 28.🏋️ A force of 260 N pushes a cart 8 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 210 N did 1470 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 1 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 360 N did 1080 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 100 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?

Answer key

  1. 140
  2. 280
  3. joule (J)
  4. 140
  5. 100
  6. 6
  7. 1
  8. 470
  9. no, work stays the same
  10. 950
  11. 10
  12. through a distance
  13. 370
  14. 6
  15. load ÷ effort
  16. 500
  17. 800
  18. 260
  19. 200
  20. 960
  21. 470
  22. 700
  23. 350
  24. 320
  25. 7
  26. 2
  27. 750
  28. 2080
  29. 7
  30. 3840
  31. 30
  32. 3
  33. 400
  34. 320
  35. 60
  36. 6
  37. 90
  38. 1000
  39. 600
  40. 3

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