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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 334 · 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 machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 240 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  6. 6.🏋️ A force of 230 N did 230 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 120 N did 1200 J of work. How many metres did the object move?
  8. 8.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  9. 9.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 4 m took 840 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 320 N did 2240 J of work. How many metres did the object move?
  12. 12.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  14. 14.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  15. 15.🏋️ A force of 10 N did 50 J of work. How many metres did the object move?
  16. 16.🏋️ 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?
  17. 17.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  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 smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A 14 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 380 N did 1900 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 390 N did 3510 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 110 N did 550 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 110 N did 880 J of work. How many metres did the object move?
  38. 38.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 320 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. 3
  2. 980
  3. 80
  4. 2160
  5. less effort
  6. 1
  7. 10
  8. joule (J)
  9. 160
  10. 210
  11. 7
  12. 320
  13. load ÷ effort
  14. through a distance
  15. 5
  16. 640
  17. 560
  18. 650
  19. 2
  20. 10
  21. 250
  22. 1760
  23. 140
  24. 160
  25. 100
  26. 270
  27. 650
  28. 480
  29. 320
  30. 3
  31. 3360
  32. 5
  33. 9
  34. 550
  35. 5
  36. 300
  37. 8
  38. 350
  39. 600
  40. 1920

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