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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 212 · 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 240 N did 480 J of work. How many metres did the object move?
  2. 2.🏋️ Pushing a crate 5 m took 500 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  6. 6.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 2 m took 500 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  11. 11.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) watt hour (d) newton (N)
  14. 14.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 170 N did 1530 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Pushing a crate 7 m took 1890 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 9 m took 2700 J of work. What force was used, in newtons?
  22. 22.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  24. 24.🏋️ Pushing a crate 3 m took 1020 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 7 m took 3430 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ 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?
  29. 29.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ 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?
  35. 35.🏋️ A force of 280 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 370 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 60 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 9 m took 2070 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 490 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. 2
  2. 100
  3. 2280
  4. 5
  5. no, work stays the same
  6. 2
  7. 250
  8. 100
  9. 1
  10. through a distance
  11. 1850
  12. 3
  13. joule (J)
  14. 700
  15. 9
  16. 3
  17. 270
  18. 150
  19. 3
  20. 1380
  21. 300
  22. 150
  23. 10
  24. 340
  25. 490
  26. 100
  27. 5
  28. 450
  29. 6
  30. 10
  31. 100
  32. 720
  33. 700
  34. 360
  35. 2240
  36. 1480
  37. 240
  38. 400
  39. 230
  40. 2940

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