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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 409 · 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.

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  1. 1.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  3. 3.🏋️ A force of 400 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  6. 6.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 110 N did 990 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  9. 9.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  10. 10.🏋️ Pushing a crate 3 m took 840 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 410 N did 4100 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 1 m took 290 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  18. 18.🏋️ Pushing a crate 9 m took 90 J of work. What force was used, in newtons?
  19. 19.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 20 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 270 N did 2700 J of work. How many metres did the object move?
  24. 24.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ An 8 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 170 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 3 m took 210 J of work. What force was used, in newtons?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 5000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  31. 31.🏋️ 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?
  32. 32.🏋️ A machine lifts a load of 120 N when you push with 40 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 7 m took 2800 J of work. What force was used, in newtons?
  39. 39.🏋️ Pushing a crate 6 m took 2820 J of work. What force was used, in newtons?
  40. 40.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?

Answer key

  1. 2280
  2. load ÷ effort
  3. 2000
  4. 100
  5. through a distance
  6. 4
  7. 9
  8. 3
  9. joule (J)
  10. 280
  11. 10
  12. 470
  13. 650
  14. 560
  15. 290
  16. 5
  17. no, work stays the same
  18. 10
  19. 280
  20. 200
  21. 2
  22. 900
  23. 10
  24. 200
  25. 240
  26. 1190
  27. 70
  28. 50
  29. 1000
  30. 300
  31. 80
  32. 3
  33. 950
  34. 320
  35. 6
  36. 200
  37. 6
  38. 400
  39. 470
  40. 40

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