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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 814 · 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 smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Pushing a crate 5 m took 1850 J of work. What force was used, in newtons?
  3. 3.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  4. 4.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  5. 5.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) the same effort (d) no effort
  7. 7.🏋️ A force of 210 N did 210 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  9. 9.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  10. 10.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 290 N pushes a cart 1 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 370 N did 2960 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 90 N did 90 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 440 N did 1760 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ 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?
  25. 25.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  28. 28.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  29. 29.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 360 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ 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)
  34. 34.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ 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?
  37. 37.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?

Answer key

  1. 1000
  2. 370
  3. load ÷ effort
  4. no, work stays the same
  5. 2
  6. less effort
  7. 1
  8. 190
  9. joule (J)
  10. 300
  11. 3
  12. 150
  13. 3
  14. 1050
  15. 2
  16. 290
  17. 100
  18. 620
  19. 8
  20. 1
  21. 4
  22. 280
  23. 150
  24. 80
  25. 3
  26. 160
  27. 1
  28. 200
  29. 160
  30. 3
  31. 3600
  32. 500
  33. 550
  34. 500
  35. 3
  36. 900
  37. 3
  38. 430
  39. 1000
  40. 9

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