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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 730 · 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 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  4. 4.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 220 N did 1980 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  8. 8.🏋️ A force of 10 N did 90 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 410 N did 3690 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 9 m took 90 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 410 N did 2460 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  25. 25.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  27. 27.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 450 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ 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)
  30. 30.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 10 N did 30 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 2 m took 880 J of work. What force was used, in newtons?
  37. 37.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  38. 38.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  39. 39.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 5
  2. 200
  3. through a distance
  4. 7
  5. 9
  6. 550
  7. no, work stays the same
  8. 9
  9. 3
  10. 250
  11. 1920
  12. 900
  13. 2
  14. 3
  15. 2
  16. 9
  17. 330
  18. 10
  19. 3
  20. 500
  21. 3840
  22. 6
  23. 360
  24. 80
  25. 20
  26. load ÷ effort
  27. 500
  28. 450
  29. 600
  30. 5
  31. 3
  32. 70
  33. 650
  34. 800
  35. 800
  36. 440
  37. less effort
  38. 2
  39. 300
  40. 700

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