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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 739 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  2. 2.🏋️ 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)
  3. 3.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  8. 8.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 290 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  11. 11.🏋️ Pushing a crate 8 m took 3920 J of work. What force was used, in newtons?
  12. 12.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  13. 13.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 10 m took 1400 J of work. What force was used, in newtons?
  17. 17.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 1 m took 450 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 20 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 210 N did 630 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  30. 30.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 30 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. joule (J)
  2. 50
  3. 650
  4. 440
  5. 3
  6. no, work stays the same
  7. through a distance
  8. 350
  9. 1160
  10. load ÷ effort
  11. 490
  12. less effort
  13. 2820
  14. 900
  15. 340
  16. 140
  17. 600
  18. 280
  19. 450
  20. 9
  21. 470
  22. 100
  23. 6
  24. 40
  25. 400
  26. 3
  27. 100
  28. 190
  29. 500
  30. 360
  31. 250
  32. 1080
  33. 270
  34. 2
  35. 90
  36. 5
  37. 130
  38. 4
  39. 460
  40. 150

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