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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 647 · 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.🏋️ 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?
  2. 2.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  4. 4.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  6. 6.🏋️ 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?
  7. 7.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  13. 13.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  20. 20.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  21. 21.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 90 N did 270 J of work. How many metres did the object move?
  23. 23.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A 9 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 20 N did 100 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 7 m took 1960 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 7 m took 1260 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 60 N pushes a cart 5 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 4 m took 600 J of work. What force was used, in newtons?
  38. 38.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  39. 39.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 80
  2. 60
  3. joule (J)
  4. 2
  5. 120
  6. 120
  7. 960
  8. 5
  9. 6
  10. 880
  11. 80
  12. through a distance
  13. 4
  14. 5
  15. 420
  16. less effort
  17. 650
  18. 2400
  19. 400
  20. load ÷ effort
  21. 9
  22. 3
  23. 6
  24. 360
  25. 5
  26. 6
  27. 280
  28. 550
  29. 680
  30. 850
  31. 460
  32. 180
  33. 4
  34. 300
  35. 5
  36. 1850
  37. 150
  38. no, work stays the same
  39. 3
  40. 800

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