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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 508 · 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 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 120 N did 840 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 210 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 60 N did 180 J of work. How many metres did the object move?
  6. 6.🏋️ 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?
  7. 7.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  16. 16.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  20. 20.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 380 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ 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
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 190 N did 1330 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 320 N did 1280 J of work. How many metres did the object move?
  38. 38.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  40. 40.🏋️ 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?

Answer key

  1. 1400
  2. 7
  3. 5
  4. 420
  5. 3
  6. 140
  7. 1000
  8. 1000
  9. 5
  10. 4
  11. 10
  12. 250
  13. 60
  14. 4
  15. joule (J)
  16. 1
  17. 780
  18. 250
  19. load ÷ effort
  20. 80
  21. 6
  22. 750
  23. 1140
  24. no, work stays the same
  25. 200
  26. 5
  27. 2
  28. 7
  29. 950
  30. 1600
  31. 9
  32. 250
  33. 340
  34. 60
  35. 430
  36. 2
  37. 4
  38. 250
  39. less effort
  40. 300

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