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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 80 · 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.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  2. 2.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 220 N pushes a cart 9 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  9. 9.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  14. 14.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 180 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.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ 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?
  27. 27.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  28. 28.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ 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?
  33. 33.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 430 N did 3870 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?

Answer key

  1. load ÷ effort
  2. 6
  3. 400
  4. 600
  5. 1
  6. 500
  7. 1980
  8. no, work stays the same
  9. 150
  10. 240
  11. 6
  12. through a distance
  13. joule (J)
  14. 480
  15. 7
  16. 4
  17. 10
  18. 80
  19. 140
  20. 3
  21. 700
  22. 1080
  23. 40
  24. 5
  25. 390
  26. 500
  27. less effort
  28. 640
  29. 950
  30. 130
  31. 5
  32. 20
  33. 5
  34. 850
  35. 100
  36. 5
  37. 310
  38. 340
  39. 9
  40. 4

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