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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 822 · 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 9 m took 1620 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A 19 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A force of 240 N pushes a cart 7 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A 1 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.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  13. 13.🏋️ A force of 10 N did 20 J of work. How many metres did the object move?
  14. 14.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  18. 18.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  21. 21.🏋️ A force of 480 N did 1440 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 440 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 9 m took 3510 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 250 N did 2000 J of work. How many metres did the object move?
  29. 29.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 290 N did 2030 J of work. How many metres did the object move?
  34. 34.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) metre (m) (d) newton (N)
  36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ 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)
  38. 38.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?

Answer key

  1. 180
  2. 2
  3. 1200
  4. 760
  5. 1680
  6. 10
  7. 4
  8. 950
  9. 10
  10. 1760
  11. 700
  12. less effort
  13. 2
  14. 150
  15. 850
  16. 3
  17. through a distance
  18. 2
  19. 4
  20. no, work stays the same
  21. 3
  22. 2640
  23. 40
  24. 390
  25. 3
  26. 2
  27. 700
  28. 8
  29. 4
  30. 80
  31. 200
  32. 2
  33. 7
  34. 550
  35. joule (J)
  36. 700
  37. 250
  38. 850
  39. 250
  40. 5

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