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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 162 · 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 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ 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
  3. 3.🏋️ A force of 340 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  5. 5.🏋️ A force of 420 N pushes a cart 1 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 10 m took 3900 J of work. What force was used, in newtons?
  7. 7.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  8. 8.🏋️ 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?
  9. 9.🏋️ Pushing a crate 4 m took 1080 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  11. 11.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) joule (J) (d) newton (N)
  13. 13.🏋️ A force of 160 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 430 N did 430 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  18. 18.🏋️ Pushing a crate 2 m took 680 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 320 N pushes a cart 2 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 120 N did 600 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 1 m took 360 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 150 N did 300 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A force of 290 N did 2900 J of work. How many metres did the object move?
  29. 29.🏋️ 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?
  30. 30.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 380 N did 3420 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  39. 39.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?

Answer key

  1. 600
  2. no, work stays the same
  3. 340
  4. less effort
  5. 420
  6. 390
  7. 290
  8. 400
  9. 270
  10. 370
  11. 450
  12. joule (J)
  13. 960
  14. through a distance
  15. 300
  16. 1
  17. 4
  18. 340
  19. 300
  20. 6
  21. 2
  22. 640
  23. 5
  24. 360
  25. 2
  26. 5
  27. 3
  28. 10
  29. 60
  30. 1380
  31. 350
  32. 100
  33. 370
  34. 2
  35. 9
  36. 3
  37. 4
  38. 5
  39. 900
  40. 5

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