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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 596 · 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.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  2. 2.🏋️ A force of 130 N did 1040 J of work. How many metres did the object move?
  3. 3.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  4. 4.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  9. 9.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  11. 11.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 460 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ 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?
  21. 21.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  23. 23.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 290 N did 1450 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ 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?
  32. 32.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
  34. 34.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 4 m took 800 J of work. What force was used, in newtons?
  36. 36.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?

Answer key

  1. through a distance
  2. 8
  3. joule (J)
  4. 6
  5. 550
  6. no, work stays the same
  7. 900
  8. load ÷ effort
  9. 2
  10. less effort
  11. 4
  12. 800
  13. 5
  14. 3200
  15. 30
  16. 6
  17. 920
  18. 1020
  19. 500
  20. 20
  21. 4
  22. 3
  23. 240
  24. 400
  25. 630
  26. 80
  27. 5
  28. 2
  29. 540
  30. 350
  31. 360
  32. 60
  33. 10
  34. 320
  35. 200
  36. 400
  37. 3
  38. 2
  39. 4
  40. 10

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