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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 645 · 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  2. 2.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 490 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  6. 6.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 400 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 80 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 360 N did 1800 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ 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)
  20. 20.🏋️ A force of 250 N did 2500 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 180 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 40 N did 240 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  25. 25.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 150 N did 600 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 10 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. load ÷ effort
  2. 2
  3. 960
  4. 4410
  5. through a distance
  6. 2
  7. 800
  8. 4
  9. 500
  10. 3
  11. 780
  12. 110
  13. 400
  14. 1000
  15. 5
  16. 860
  17. 250
  18. 5
  19. 50
  20. 10
  21. 950
  22. 360
  23. 6
  24. 80
  25. 80
  26. 4
  27. 180
  28. 280
  29. 300
  30. 50
  31. 550
  32. 200
  33. 30
  34. 90
  35. 650
  36. 470
  37. 6
  38. 3500
  39. 500
  40. 200

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