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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 232 · 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 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  5. 5.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 190 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 3 m took 1290 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ 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?
  14. 14.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ 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?
  17. 17.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 10 m took 2800 J of work. What force was used, in newtons?
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  26. 26.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 1 m took 120 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  37. 37.🏋️ 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?
  38. 38.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 470 N did 470 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 3
  2. 300
  3. 250
  4. joule (J)
  5. 2
  6. 5
  7. 100
  8. 5
  9. 190
  10. 430
  11. 640
  12. 200
  13. 650
  14. 20
  15. 200
  16. 80
  17. 4
  18. 40
  19. 1200
  20. 100
  21. 7
  22. 6
  23. 5
  24. 280
  25. no, work stays the same
  26. 570
  27. 250
  28. 5
  29. 60
  30. 120
  31. 100
  32. 1
  33. 1880
  34. 4
  35. 4
  36. less effort
  37. 120
  38. 4
  39. 1
  40. 1300

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