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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 388 · 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 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 150 N did 300 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 420 N did 1680 J of work. How many metres did the object move?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  5. 5.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  7. 7.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  11. 11.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 10 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 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ 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)
  22. 22.🏋️ Pushing a crate 6 m took 2700 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 300 N did 3000 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 4 m took 120 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 70 N did 560 J of work. How many metres did the object move?
  30. 30.🏋️ 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)
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ An 18 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 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  35. 35.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 260 N pushes a cart 10 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 3250 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  39. 39.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?

Answer key

  1. 3
  2. 2
  3. 4
  4. load ÷ effort
  5. 9
  6. through a distance
  7. 20
  8. 2
  9. 120
  10. less effort
  11. 3500
  12. 500
  13. 390
  14. 500
  15. 60
  16. 100
  17. 120
  18. 620
  19. 2
  20. 130
  21. 250
  22. 450
  23. 10
  24. 6
  25. 50
  26. 6
  27. 30
  28. 2
  29. 8
  30. 900
  31. 4
  32. 720
  33. 1440
  34. joule (J)
  35. 370
  36. 2600
  37. 650
  38. no, work stays the same
  39. 130
  40. 2

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