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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 909 · 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 force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  5. 5.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 300 N did 1800 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  16. 16.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  17. 17.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A force of 110 N did 110 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 130 N did 390 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  27. 27.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 250 N did 1000 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ 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?
  37. 37.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. 280
  2. 6
  3. 1080
  4. less effort
  5. 560
  6. 900
  7. 400
  8. 6
  9. 1550
  10. 1190
  11. 5
  12. 3
  13. 650
  14. 700
  15. no, work stays the same
  16. through a distance
  17. 4
  18. 50
  19. 1300
  20. 3
  21. 60
  22. 1
  23. 3
  24. 3
  25. 6
  26. load ÷ effort
  27. 50
  28. 450
  29. 3
  30. 7
  31. 6
  32. 5
  33. 4
  34. 1000
  35. 50
  36. 40
  37. 5
  38. 300
  39. 50
  40. 130

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