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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 580 · 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.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  2. 2.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  9. 9.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  11. 11.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 20 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 8 m took 2080 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 490 N did 2450 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 110 N did 110 J of work. How many metres did the object move?
  19. 19.🏋️ 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?
  20. 20.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  21. 21.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 420 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 300 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 260 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 110 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 12 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 470 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?

Answer key

  1. joule (J)
  2. 1080
  3. 40
  4. load ÷ effort
  5. 700
  6. 2
  7. 640
  8. 140
  9. 200
  10. no, work stays the same
  11. 900
  12. 160
  13. 3
  14. 260
  15. 5
  16. 9
  17. 50
  18. 1
  19. 60
  20. through a distance
  21. 2
  22. 800
  23. 1260
  24. 2400
  25. 4
  26. 360
  27. 300
  28. 260
  29. 650
  30. 600
  31. 770
  32. 150
  33. 280
  34. 3520
  35. 120
  36. 7
  37. 3
  38. 1050
  39. 470
  40. 2

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