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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 451 · 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 machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  5. 5.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 200 N did 1800 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  9. 9.🏋️ 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?
  10. 10.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 150 N did 1500 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 230 N did 2070 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 460 N did 4600 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 310 N did 2170 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 7 m took 2380 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 4 m took 1280 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 40 N pushes a cart 5 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ 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
  37. 37.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 6
  2. 3
  3. 1230
  4. through a distance
  5. 120
  6. 9
  7. 5
  8. load ÷ effort
  9. 240
  10. 120
  11. 6
  12. joule (J)
  13. 200
  14. 6
  15. 850
  16. 10
  17. 9
  18. 10
  19. 960
  20. 450
  21. 350
  22. 470
  23. 7
  24. 5
  25. 700
  26. 340
  27. 320
  28. 240
  29. 440
  30. 290
  31. 200
  32. 360
  33. 600
  34. 400
  35. 440
  36. no, work stays the same
  37. 1850
  38. 30
  39. 8
  40. 300

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