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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 293 · 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 smooth ramp is 8 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  6. 6.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  10. 10.🏋️ A force of 200 N pushes a cart 8 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  13. 13.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  14. 14.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 2 m took 280 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 150 N did 750 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 290 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  20. 20.🏋️ Pushing a crate 4 m took 240 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 6 m took 1620 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 440 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 90 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Pushing a crate 10 m took 300 J of work. What force was used, in newtons?
  31. 31.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  37. 37.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 390 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  40. 40.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 50
  2. 410
  3. 2
  4. less effort
  5. through a distance
  6. 300
  7. 650
  8. 3
  9. load ÷ effort
  10. 1600
  11. 5
  12. joule (J)
  13. 120
  14. 40
  15. 140
  16. 5
  17. 2
  18. 580
  19. no, work stays the same
  20. 60
  21. 270
  22. 1050
  23. 200
  24. 440
  25. 400
  26. 2940
  27. 450
  28. 1600
  29. 4
  30. 30
  31. 5
  32. 200
  33. 500
  34. 250
  35. 100
  36. 200
  37. 90
  38. 390
  39. 3
  40. 450

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