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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 312 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ 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)
  4. 4.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  6. 6.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  11. 11.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 170 N did 1020 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  18. 18.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) no effort (d) more effort
  20. 20.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  21. 21.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) yes, always (d) no, work stays the same
  22. 22.🏋️ A machine lifts a load of 420 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 30 N pushes a cart 6 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 340 N pushes a cart 5 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 230 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ Pushing a crate 8 m took 1280 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 330 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 250 N pushes a cart 8 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?

Answer key

  1. 230
  2. 2
  3. 600
  4. 120
  5. joule (J)
  6. 300
  7. 2
  8. 150
  9. 60
  10. through a distance
  11. 250
  12. 420
  13. 2
  14. 1050
  15. 620
  16. 6
  17. 360
  18. load ÷ effort
  19. less effort
  20. 3
  21. no, work stays the same
  22. 6
  23. 950
  24. 180
  25. 300
  26. 200
  27. 30
  28. 850
  29. 1700
  30. 550
  31. 230
  32. 2
  33. 130
  34. 4
  35. 160
  36. 1260
  37. 330
  38. 5
  39. 2000
  40. 490

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