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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 52 · 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 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  5. 5.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 370 N did 3330 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  10. 10.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  13. 13.🏋️ 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)
  14. 14.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 7 m took 2590 J of work. What force was used, in newtons?
  16. 16.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  17. 17.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  18. 18.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 400 N pushes a cart 10 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 1600 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 1 m took 90 J of work. What force was used, in newtons?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  25. 25.🏋️ A force of 80 N did 480 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 420 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ Pushing a crate 4 m took 1560 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 380 N did 3800 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 170 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  39. 39.🏋️ 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?
  40. 40.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 260
  2. 120
  3. 570
  4. 2000
  5. 400
  6. 370
  7. 9
  8. 400
  9. 9
  10. 190
  11. 700
  12. no, work stays the same
  13. 650
  14. 60
  15. 370
  16. joule (J)
  17. through a distance
  18. 3
  19. 2
  20. 4000
  21. 800
  22. 2
  23. 90
  24. load ÷ effort
  25. 6
  26. 480
  27. 980
  28. 4
  29. 1260
  30. 3780
  31. 390
  32. 7
  33. 6
  34. 10
  35. 170
  36. 90
  37. 250
  38. less effort
  39. 480
  40. 650

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