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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 185 · 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 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) through a distance (d) only upwards
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ 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)
  6. 6.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  7. 7.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A 12 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 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  18. 18.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  23. 23.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  24. 24.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) more effort (d) the same effort
  25. 25.🏋️ Pushing a crate 8 m took 2720 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 40 N did 200 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  29. 29.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 100 N did 1000 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 280 N did 1680 J of work. How many metres did the object move?

Answer key

  1. 2
  2. through a distance
  3. 6
  4. 2
  5. 900
  6. joule (J)
  7. 100
  8. 80
  9. 6
  10. 7
  11. 3
  12. 150
  13. 20
  14. 1400
  15. 360
  16. 3
  17. 290
  18. 200
  19. 5
  20. 960
  21. 6
  22. 200
  23. load ÷ effort
  24. less effort
  25. 340
  26. 5
  27. 150
  28. no, work stays the same
  29. 640
  30. 2
  31. 120
  32. 130
  33. 4140
  34. 150
  35. 570
  36. 10
  37. 550
  38. 8
  39. 4
  40. 6

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