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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 915 · 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 smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  3. 3.🏋️ 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?
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  5. 5.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  9. 9.🏋️ A force of 140 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 120 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 8 m took 3600 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Pushing a crate 1 m took 140 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 290 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ An 8 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.🏋️ Pushing a crate 10 m took 600 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  28. 28.🏋️ Pushing a crate 6 m took 2700 J of work. What force was used, in newtons?
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 90 N did 450 J of work. How many metres did the object move?
  32. 32.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  33. 33.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 290 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 10 N pushes a cart 1 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 410 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ 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)
  40. 40.🏋️ A force of 100 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 800
  2. less effort
  3. 190
  4. joule (J)
  5. 4
  6. 3
  7. 4
  8. load ÷ effort
  9. 560
  10. 720
  11. 450
  12. 1
  13. 250
  14. 140
  15. 230
  16. 2030
  17. 2
  18. 320
  19. 60
  20. 750
  21. 1820
  22. 210
  23. 300
  24. 3
  25. 900
  26. 5
  27. through a distance
  28. 450
  29. 250
  30. 360
  31. 5
  32. no, work stays the same
  33. 120
  34. 1450
  35. 10
  36. 2050
  37. 6
  38. 50
  39. 250
  40. 800

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