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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 755 · 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 4 m took 200 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ 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)
  7. 7.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 300 N pushes a cart 6 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 130 N did 520 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 3 m took 1230 J of work. What force was used, in newtons?
  14. 14.🏋️ 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
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  16. 16.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  17. 17.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 370 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  20. 20.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 160 N did 1600 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 70 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 200 N did 1400 J of work. How many metres did the object move?
  31. 31.🏋️ A 17 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 6 m took 1980 J of work. What force was used, in newtons?

Answer key

  1. 50
  2. 2
  3. 6
  4. 180
  5. 4
  6. 700
  7. 20
  8. 1800
  9. 5
  10. 4
  11. 2
  12. 50
  13. 410
  14. no, work stays the same
  15. load ÷ effort
  16. less effort
  17. 100
  18. 370
  19. through a distance
  20. 90
  21. 10
  22. 490
  23. 4
  24. 260
  25. 240
  26. 5
  27. 140
  28. 350
  29. 600
  30. 7
  31. 680
  32. 5
  33. 120
  34. 8
  35. 320
  36. 1700
  37. 4
  38. 2
  39. 2
  40. 330

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