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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 476 · 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 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  6. 6.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  7. 7.🏋️ A force of 210 N did 1260 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 600 N when you push with 100 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 5 m took 1050 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 370 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 180 N did 1620 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 460 N did 1380 J of work. How many metres did the object move?
  16. 16.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) only upwards (d) very slowly
  17. 17.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 150 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) watt hour (d) newton (N)
  21. 21.🏋️ A force of 260 N did 1820 J of work. How many metres did the object move?
  22. 22.🏋️ 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)
  23. 23.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  25. 25.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) yes, always (d) only on Mondays
  29. 29.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) less effort (d) no effort
  30. 30.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 470 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  34. 34.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ Pushing a crate 10 m took 1600 J of work. What force was used, in newtons?
  36. 36.🏋️ 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?
  37. 37.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 30 N pushes a cart 4 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 470 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?

Answer key

  1. 980
  2. 3
  3. 400
  4. 1080
  5. load ÷ effort
  6. 1
  7. 6
  8. 4400
  9. 2
  10. 6
  11. 5
  12. 210
  13. 370
  14. 9
  15. 3
  16. through a distance
  17. 3
  18. 140
  19. 300
  20. joule (J)
  21. 7
  22. 850
  23. 2
  24. 8
  25. 450
  26. 1820
  27. 640
  28. no, work stays the same
  29. less effort
  30. 360
  31. 3290
  32. 50
  33. 10
  34. 280
  35. 160
  36. 950
  37. 1
  38. 120
  39. 1410
  40. 220

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