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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 792 · 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 force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  3. 3.🏋️ A 9 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.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ 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
  6. 6.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  11. 11.🏋️ Pushing a crate 7 m took 980 J of work. What force was used, in newtons?
  12. 12.🏋️ A force of 100 N did 700 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 6 m took 2280 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A 20 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 force of 350 N did 1050 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?
  22. 22.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  23. 23.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Pushing a crate 5 m took 1900 J of work. What force was used, in newtons?
  25. 25.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  26. 26.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ 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?
  31. 31.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 160 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 190 N did 950 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 450 N did 2250 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 600 N when you push with 120 N. What is its mechanical advantage (MA)?

Answer key

  1. 1720
  2. 10
  3. 90
  4. 950
  5. no, work stays the same
  6. 700
  7. 6
  8. 2
  9. 5
  10. through a distance
  11. 140
  12. 7
  13. 150
  14. 380
  15. 20
  16. 400
  17. 3
  18. 770
  19. 1
  20. 90
  21. 200
  22. less effort
  23. 850
  24. 380
  25. joule (J)
  26. 1110
  27. 3
  28. 7
  29. 900
  30. 80
  31. 200
  32. 6
  33. 160
  34. 360
  35. 750
  36. 250
  37. 640
  38. 5
  39. 5
  40. 5

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