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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 112 · 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 force of 360 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ 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
  3. 3.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  7. 7.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  8. 8.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  9. 9.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 6 m took 2520 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 270 N did 270 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 2730 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 9 m took 3150 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 6 m took 480 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 7 m took 3500 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  23. 23.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  24. 24.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ 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?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  29. 29.🏋️ Pushing a crate 10 m took 4500 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 110 N did 440 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 290 N did 2900 J of work. How many metres did the object move?
  37. 37.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ Pushing a crate 8 m took 1760 J of work. What force was used, in newtons?

Answer key

  1. 1440
  2. no, work stays the same
  3. 2
  4. 4
  5. 650
  6. joule (J)
  7. 2
  8. through a distance
  9. 2480
  10. 150
  11. 1020
  12. 420
  13. 4
  14. 50
  15. 1
  16. 690
  17. 160
  18. 390
  19. 350
  20. 80
  21. 500
  22. 3
  23. less effort
  24. 260
  25. 10
  26. 4
  27. 100
  28. load ÷ effort
  29. 450
  30. 4
  31. 4
  32. 760
  33. 180
  34. 240
  35. 400
  36. 10
  37. 2
  38. 360
  39. 6
  40. 220

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