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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 681 · 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.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  2. 2.🏋️ A force of 310 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ An 8 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.🏋️ Pushing a crate 8 m took 3280 J of work. What force was used, in newtons?
  6. 6.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  8. 8.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  11. 11.🏋️ In which unit is work measured? (a) metre (m) (b) joule (J) (c) newton (N) (d) watt hour
  12. 12.🏋️ A force of 320 N did 2560 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
  14. 14.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ Pushing a crate 8 m took 1920 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 350 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 9 m took 180 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 370 N pushes a cart 3 m along the floor. How much work is done, in joules?
  23. 23.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  26. 26.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 130 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 250 N pushes a cart 4 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 5 m took 1000 J of work. What force was used, in newtons?
  31. 31.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) only on Mondays (d) yes, always
  32. 32.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  35. 35.🏋️ A 4 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 330 N did 1980 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 9 m took 3420 J of work. What force was used, in newtons?

Answer key

  1. through a distance
  2. 1860
  3. 3
  4. 400
  5. 410
  6. 70
  7. 3
  8. 6
  9. 3
  10. 870
  11. joule (J)
  12. 8
  13. 2
  14. 520
  15. 240
  16. 3150
  17. 320
  18. 10
  19. 4
  20. 50
  21. 20
  22. 1110
  23. 380
  24. 6
  25. load ÷ effort
  26. 80
  27. 1040
  28. 1000
  29. 4
  30. 200
  31. no, work stays the same
  32. 110
  33. 160
  34. 210
  35. 40
  36. 6
  37. 540
  38. 80
  39. 60
  40. 380

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