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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 715 · 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 longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  3. 3.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  6. 6.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A force of 170 N pushes a cart 9 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 10 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.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  15. 15.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 8 m took 2240 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  25. 25.🏋️ Pushing a crate 9 m took 4140 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 9 m took 810 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 2 m took 620 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 150 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. less effort
  2. joule (J)
  3. 4410
  4. 140
  5. no, work stays the same
  6. 240
  7. 160
  8. 4
  9. 400
  10. 400
  11. 2
  12. 1530
  13. 100
  14. through a distance
  15. 550
  16. 210
  17. 70
  18. 5
  19. 250
  20. 230
  21. 280
  22. 3
  23. 2
  24. load ÷ effort
  25. 460
  26. 3
  27. 90
  28. 350
  29. 30
  30. 6
  31. 100
  32. 150
  33. 3
  34. 300
  35. 2
  36. 310
  37. 6
  38. 150
  39. 900
  40. 280

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