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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 461 · 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 8 m took 240 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  4. 4.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  6. 6.🏋️ A force of 150 N did 1500 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  9. 9.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 430 N did 860 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 30 N did 270 J of work. How many metres did the object move?
  18. 18.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 13 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  23. 23.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ 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?
  25. 25.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ 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?
  28. 28.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 450 N did 450 J of work. How many metres did the object move?
  35. 35.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 5 m took 150 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 260 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. 30
  2. 3
  3. load ÷ effort
  4. 6
  5. no, work stays the same
  6. 10
  7. 2
  8. less effort
  9. 140
  10. 130
  11. 6
  12. 2
  13. 1
  14. 2
  15. 80
  16. 3
  17. 9
  18. 240
  19. 20
  20. 1050
  21. 650
  22. through a distance
  23. 300
  24. 280
  25. 200
  26. 600
  27. 60
  28. 200
  29. 360
  30. 180
  31. 5
  32. 2
  33. 720
  34. 1
  35. 600
  36. 450
  37. 3
  38. 30
  39. 2
  40. 1300

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