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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 641 · 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 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  4. 4.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  10. 10.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 90 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 470 N did 2820 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  16. 16.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  17. 17.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 430 N pushes a cart 10 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 110 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 70 N pushes a cart 9 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 180 N did 360 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 330 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  28. 28.🏋️ A force of 340 N pushes a cart 10 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ 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?
  31. 31.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  37. 37.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 30 N did 30 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 7 m took 2660 J of work. What force was used, in newtons?

Answer key

  1. 3
  2. 600
  3. through a distance
  4. 20
  5. 2
  6. 850
  7. 5
  8. 600
  9. no, work stays the same
  10. 5
  11. 360
  12. 390
  13. 6
  14. 6
  15. less effort
  16. 70
  17. 2
  18. 4300
  19. 550
  20. 630
  21. 2
  22. 1650
  23. 2400
  24. 130
  25. 750
  26. 100
  27. load ÷ effort
  28. 3400
  29. 6
  30. 10
  31. 2
  32. 240
  33. 900
  34. 3
  35. 4
  36. joule (J)
  37. 2400
  38. 1
  39. 800
  40. 380

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