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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 694 · 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 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  3. 3.🏋️ An 11 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 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?
  5. 5.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) yes, by half (d) only on Mondays
  8. 8.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 470 N did 3760 J of work. How many metres did the object move?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  12. 12.🏋️ A force of 400 N pushes a cart 7 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 470 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 420 N did 3780 J of work. How many metres did the object move?
  18. 18.🏋️ A 17 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 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ 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?
  22. 22.🏋️ A force of 70 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
  34. 34.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 8 m took 3680 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 270 N did 1350 J of work. How many metres did the object move?
  39. 39.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  40. 40.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. through a distance
  3. 220
  4. 320
  5. 7
  6. 550
  7. no, work stays the same
  8. 70
  9. 6
  10. 8
  11. load ÷ effort
  12. 2800
  13. 700
  14. 4230
  15. 2
  16. 900
  17. 9
  18. 680
  19. 1000
  20. 2
  21. 800
  22. 490
  23. 880
  24. 560
  25. 250
  26. 120
  27. 4
  28. 2
  29. 200
  30. 750
  31. 6
  32. 1100
  33. 1
  34. 30
  35. 460
  36. 1500
  37. 2
  38. 5
  39. joule (J)
  40. 4

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