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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 288 · 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.

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  1. 1.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  3. 3.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  9. 9.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 8 m took 2320 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 310 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 430 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 70 N did 210 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ An 18 kg box is lifted straight up by 2 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 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  27. 27.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 170 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 150 N pushes a cart 9 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 200 N did 2000 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 5 m took 2000 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 400 N did 3600 J of work. How many metres did the object move?

Answer key

  1. 3
  2. less effort
  3. 400
  4. 850
  5. 400
  6. joule (J)
  7. load ÷ effort
  8. no, work stays the same
  9. 2
  10. 80
  11. 290
  12. 1860
  13. 2150
  14. 600
  15. 3
  16. 6
  17. 2
  18. 360
  19. 20
  20. 560
  21. 6
  22. 90
  23. 320
  24. 200
  25. 180
  26. 3
  27. 640
  28. 850
  29. 1350
  30. 10
  31. 400
  32. 9
  33. 500
  34. 410
  35. 2
  36. 8
  37. 1980
  38. 4
  39. 5
  40. 9

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