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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 702 · 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 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  3. 3.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 230 N did 2070 J of work. How many metres did the object move?
  5. 5.🏋️ 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?
  6. 6.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 10 m took 1900 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 420 N did 1260 J of work. How many metres did the object move?
  10. 10.🏋️ A 5 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 smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  15. 15.🏋️ 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
  16. 16.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ Pushing a crate 5 m took 1600 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 20 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A 6 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  22. 22.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  23. 23.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 1 m took 210 J of work. What force was used, in newtons?
  25. 25.🏋️ A 16 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 force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 150 N did 1050 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 100 N pushes a cart 6 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  38. 38.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  39. 39.🏋️ A force of 200 N did 2000 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 190
  2. load ÷ effort
  3. 3
  4. 9
  5. 500
  6. 240
  7. 190
  8. 2
  9. 3
  10. 250
  11. 150
  12. 400
  13. 4
  14. joule (J)
  15. no, work stays the same
  16. 3150
  17. 2
  18. 320
  19. 20
  20. 180
  21. 7
  22. less effort
  23. 4
  24. 210
  25. 480
  26. 1260
  27. 450
  28. 200
  29. 7
  30. 100
  31. 10
  32. 260
  33. 150
  34. 600
  35. 600
  36. 5
  37. 160
  38. through a distance
  39. 10
  40. 840

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