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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 210 · 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 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 7 m took 280 J of work. What force was used, in newtons?
  6. 6.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  8. 8.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  9. 9.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  10. 10.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  11. 11.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  16. 16.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 470 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 240 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ An 18 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 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  27. 27.🏋️ 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)
  28. 28.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 30 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 3 m took 780 J of work. What force was used, in newtons?
  33. 33.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 3 m took 1410 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 60 N did 420 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?

Answer key

  1. 700
  2. 6
  3. 350
  4. 5
  5. 40
  6. 110
  7. through a distance
  8. no, work stays the same
  9. less effort
  10. joule (J)
  11. 220
  12. 640
  13. 900
  14. 2
  15. load ÷ effort
  16. 130
  17. 2
  18. 3760
  19. 720
  20. 550
  21. 5
  22. 80
  23. 720
  24. 570
  25. 150
  26. 2
  27. 700
  28. 480
  29. 90
  30. 570
  31. 750
  32. 260
  33. 90
  34. 870
  35. 470
  36. 6
  37. 700
  38. 7
  39. 10
  40. 80

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