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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 198 · 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.🏋️ 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
  2. 2.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 9 m took 1980 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 370 N did 3330 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 150 N pushes a cart 4 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 1 m took 40 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 3 m took 660 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load ÷ effort (d) load + effort
  40. 40.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. no, work stays the same
  2. 3
  3. 5
  4. 380
  5. 220
  6. 7
  7. 5
  8. 2
  9. 650
  10. 800
  11. 330
  12. 1440
  13. 9
  14. 2
  15. 920
  16. 60
  17. 700
  18. 6
  19. 600
  20. 500
  21. 200
  22. 840
  23. 450
  24. 6
  25. 40
  26. 120
  27. 4
  28. 2
  29. 2
  30. 150
  31. 3
  32. 160
  33. 220
  34. 10
  35. 280
  36. 2
  37. 370
  38. 500
  39. load ÷ effort
  40. 60

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