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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 579 · 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 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 30 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A force of 380 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  11. 11.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  15. 15.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 320 N did 640 J of work. How many metres did the object move?
  17. 17.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Work is done when a force moves something … (a) through a distance (b) only upwards (c) without moving it (d) very slowly
  19. 19.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 10 m took 1600 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 420 N did 840 J of work. How many metres did the object move?
  23. 23.🏋️ 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)
  24. 24.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ 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)
  29. 29.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 8 m took 3760 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 220 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  35. 35.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 140 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 10 m took 2000 J of work. What force was used, in newtons?

Answer key

  1. 2640
  2. 210
  3. 480
  4. 5
  5. 4
  6. 2660
  7. 500
  8. 50
  9. 800
  10. less effort
  11. 700
  12. 4
  13. 360
  14. joule (J)
  15. 600
  16. 2
  17. 750
  18. through a distance
  19. 2
  20. 160
  21. 5
  22. 2
  23. 1000
  24. 2
  25. 640
  26. 6
  27. 400
  28. 650
  29. 240
  30. 470
  31. 240
  32. 1540
  33. 6
  34. load ÷ effort
  35. 100
  36. 1
  37. 1410
  38. 3
  39. 420
  40. 200

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