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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 100 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  2. 2.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  5. 5.🏋️ Pushing a crate 7 m took 1190 J of work. What force was used, in newtons?
  6. 6.🏋️ Pushing a crate 1 m took 240 J of work. What force was used, in newtons?
  7. 7.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  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 longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  11. 11.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
  13. 13.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  15. 15.🏋️ 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)
  16. 16.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 1 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.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  24. 24.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A 4 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.🏋️ 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)
  27. 27.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 170 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ 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
  31. 31.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  32. 32.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  33. 33.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?

Answer key

  1. through a distance
  2. 6
  3. 800
  4. 120
  5. 170
  6. 240
  7. 340
  8. 700
  9. 3
  10. less effort
  11. 280
  12. 6
  13. 50
  14. 200
  15. 500
  16. 5
  17. 2
  18. 10
  19. 2
  20. 3
  21. 2
  22. 150
  23. load ÷ effort
  24. 650
  25. 80
  26. 50
  27. 4
  28. 1700
  29. 250
  30. no, work stays the same
  31. 390
  32. 470
  33. 900
  34. 100
  35. 1000
  36. 60
  37. 4
  38. 1350
  39. 3
  40. 140

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