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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 10 · 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 machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  4. 4.🏋️ Pushing a crate 4 m took 1560 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 260 N pushes a cart 10 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  7. 7.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  8. 8.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 230 N did 460 J of work. How many metres did the object move?
  10. 10.🏋️ 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?
  11. 11.🏋️ A force of 240 N did 480 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 7 m took 1400 J of work. What force was used, in newtons?
  14. 14.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  15. 15.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  17. 17.🏋️ 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?
  18. 18.🏋️ A force of 60 N did 240 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  22. 22.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  24. 24.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 210 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 420 N did 2100 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 450 N pushes a cart 5 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  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 machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 5 m took 650 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 3 m took 30 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. 6
  3. no, work stays the same
  4. 390
  5. 2600
  6. through a distance
  7. 310
  8. 2
  9. 2
  10. 550
  11. 2
  12. 1000
  13. 200
  14. joule (J)
  15. 6
  16. 2
  17. 110
  18. 4
  19. 170
  20. 1000
  21. load ÷ effort
  22. 20
  23. 1
  24. 50
  25. 1
  26. 1470
  27. 510
  28. 580
  29. 5
  30. 5
  31. 190
  32. 2250
  33. 2
  34. 280
  35. 4
  36. 630
  37. 250
  38. 2
  39. 130
  40. 10

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