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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 601 · 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 force of 390 N did 3510 J of work. How many metres did the object move?
  2. 2.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  3. 3.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  7. 7.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  8. 8.🏋️ A force of 180 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 8 m took 3360 J of work. What force was used, in newtons?
  10. 10.🏋️ 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)
  11. 11.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  15. 15.🏋️ 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)
  16. 16.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 200 N did 600 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 90 N did 630 J of work. How many metres did the object move?
  25. 25.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  27. 27.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
  32. 32.🏋️ 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?
  33. 33.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  34. 34.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 50 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 110 N did 440 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 210 N did 1680 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?

Answer key

  1. 9
  2. through a distance
  3. 480
  4. 2720
  5. 200
  6. 8
  7. less effort
  8. 1800
  9. 420
  10. 550
  11. 160
  12. 450
  13. 350
  14. no, work stays the same
  15. 400
  16. 2
  17. 10
  18. 300
  19. 3
  20. 2
  21. 1080
  22. 400
  23. 2640
  24. 7
  25. 160
  26. load ÷ effort
  27. 4
  28. 6
  29. 800
  30. 6
  31. 3
  32. 80
  33. joule (J)
  34. 370
  35. 350
  36. 3
  37. 4
  38. 900
  39. 8
  40. 6

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