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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 621 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  2. 2.🏋️ 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)
  3. 3.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A force of 270 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  6. 6.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  9. 9.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 7 m took 350 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 10 m took 2200 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 300 N did 2700 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 230 N did 1150 J of work. How many metres did the object move?
  22. 22.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ 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?
  24. 24.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  25. 25.🏋️ Pushing a crate 6 m took 2880 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  27. 27.🏋️ 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)
  28. 28.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 460 N did 1840 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  33. 33.🏋️ 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)
  34. 34.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 70 N did 140 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. through a distance
  2. 200
  3. 700
  4. 1620
  5. no, work stays the same
  6. 460
  7. 360
  8. joule (J)
  9. 230
  10. 50
  11. 2
  12. 500
  13. 220
  14. 3
  15. 1400
  16. 250
  17. 1470
  18. 9
  19. 2
  20. 800
  21. 5
  22. 640
  23. 760
  24. 9
  25. 480
  26. 3
  27. 950
  28. 320
  29. 4
  30. 3
  31. 4
  32. 380
  33. 350
  34. 20
  35. 200
  36. 2
  37. 720
  38. 90
  39. 60
  40. 950

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