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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 710 · 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 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  3. 3.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  5. 5.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  7. 7.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  11. 11.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 460 N did 2300 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 5 m took 250 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ 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?
  21. 21.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ 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)
  28. 28.🏋️ A force of 120 N pushes a cart 8 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 180 N did 360 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 40 N did 40 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  32. 32.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 430 N pushes a cart 10 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 410 N did 820 J of work. How many metres did the object move?
  37. 37.🏋️ 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)
  38. 38.🏋️ A force of 210 N did 1680 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?

Answer key

  1. 450
  2. 4
  3. 720
  4. 2
  5. through a distance
  6. load ÷ effort
  7. 5
  8. 230
  9. 3
  10. 3
  11. 150
  12. 100
  13. 5
  14. 7
  15. 50
  16. 200
  17. 4
  18. 440
  19. 800
  20. 10
  21. 3
  22. 4
  23. 300
  24. 7
  25. 60
  26. 3430
  27. 400
  28. 960
  29. 2
  30. 1
  31. 210
  32. 6
  33. 140
  34. 990
  35. 4300
  36. 2
  37. 450
  38. 8
  39. 4
  40. 3

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