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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 821 · 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 1 m took 410 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 6 m took 240 J of work. What force was used, in newtons?
  3. 3.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) very slowly (d) without moving it
  8. 8.🏋️ 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
  9. 9.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  11. 11.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  12. 12.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  13. 13.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  14. 14.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  26. 26.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 500 N did 3000 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 300 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?

Answer key

  1. 410
  2. 40
  3. 230
  4. 600
  5. 20
  6. 4
  7. through a distance
  8. no, work stays the same
  9. 2
  10. 2
  11. less effort
  12. 140
  13. joule (J)
  14. 800
  15. 50
  16. 6
  17. 60
  18. 300
  19. 1980
  20. 540
  21. 5
  22. 1290
  23. 8
  24. 100
  25. 170
  26. 240
  27. 500
  28. 800
  29. 250
  30. 850
  31. 6
  32. 6
  33. 3
  34. 1200
  35. 720
  36. 450
  37. 6
  38. 470
  39. 1000
  40. 230

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