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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 13 · 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 machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A force of 10 N did 70 J of work. How many metres did the object move?
  4. 4.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  8. 8.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 480 N pushes a cart 6 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 480 N did 2400 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 4 m took 360 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 460 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
  19. 19.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 360 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  25. 25.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ 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?
  37. 37.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 90 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. load ÷ effort
  2. 3
  3. 7
  4. 700
  5. less effort
  6. 850
  7. through a distance
  8. 800
  9. 210
  10. 2
  11. 2880
  12. 5
  13. 90
  14. 3
  15. 1380
  16. 720
  17. 7
  18. 4
  19. 290
  20. 300
  21. 450
  22. 1050
  23. 1440
  24. joule (J)
  25. 5
  26. 1000
  27. 120
  28. 3
  29. 160
  30. 9
  31. 400
  32. 40
  33. 150
  34. 3
  35. 4
  36. 300
  37. 9
  38. 5
  39. 420
  40. 540

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