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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 947 · 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 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?
  2. 2.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  5. 5.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 430 N did 3440 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 360 N pushes a cart 1 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 9 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ 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?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) effort ÷ load (d) load × effort
  11. 11.🏋️ Pushing a crate 5 m took 200 J of work. What force was used, in newtons?
  12. 12.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 90 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ 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?
  16. 16.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  17. 17.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 7 m took 2940 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 360 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 4 m took 1320 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  24. 24.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 330 N did 1650 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 8 m took 160 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 280 N did 2240 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 20 N did 80 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 340 N did 2720 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 320 N did 2880 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 330 N did 1980 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 4 m took 1240 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 320 N did 640 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 110 N did 220 J of work. How many metres did the object move?

Answer key

  1. 90
  2. 5
  3. 4
  4. 130
  5. 100
  6. 8
  7. 360
  8. 270
  9. 160
  10. load ÷ effort
  11. 40
  12. 160
  13. 340
  14. 900
  15. 360
  16. through a distance
  17. 400
  18. 420
  19. 2
  20. 720
  21. 330
  22. 4
  23. joule (J)
  24. 1050
  25. 6
  26. 850
  27. 5
  28. 10
  29. 10
  30. 20
  31. 8
  32. 4
  33. 8
  34. 2
  35. 9
  36. 2800
  37. 6
  38. 310
  39. 2
  40. 2

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