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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 545 · 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) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  2. 2.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  8. 8.🏋️ A 10 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  14. 14.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 50 N did 450 J of work. How many metres did the object move?
  16. 16.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  17. 17.🏋️ A force of 210 N did 840 J of work. How many metres did the object move?
  18. 18.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 6 m took 1020 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  23. 23.🏋️ 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?
  24. 24.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Pushing a crate 8 m took 560 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 5 m took 1950 J of work. What force was used, in newtons?
  30. 30.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 3 m took 1140 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 4 m took 1880 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 280 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  40. 40.🏋️ A 13 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. 8
  3. 1900
  4. 3
  5. 260
  6. 950
  7. load ÷ effort
  8. 400
  9. 4
  10. 80
  11. 5
  12. 7
  13. through a distance
  14. 4
  15. 9
  16. less effort
  17. 4
  18. 70
  19. 170
  20. 770
  21. 240
  22. 150
  23. 200
  24. 6
  25. 950
  26. 540
  27. 70
  28. 3
  29. 390
  30. 5
  31. 380
  32. 470
  33. 6
  34. 1400
  35. 50
  36. 10
  37. 6
  38. 9
  39. 2
  40. 260

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