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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 249 · 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 machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 280 N pushes a cart 4 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 300 N did 900 J of work. How many metres did the object move?
  4. 4.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 8 m took 2000 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  8. 8.🏋️ A force of 260 N did 2340 J of work. How many metres did the object move?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  10. 10.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  13. 13.🏋️ A force of 90 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ 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?
  15. 15.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) metre (m) (d) watt hour
  16. 16.🏋️ A force of 480 N did 1920 J of work. How many metres did the object move?
  17. 17.🏋️ 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?
  18. 18.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 370 N did 740 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 400 N did 3600 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 4 m took 2000 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 7 m took 70 J of work. What force was used, in newtons?
  34. 34.🏋️ 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?
  35. 35.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 410 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 20 N pushes a cart 4 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 300 N did 600 J of work. How many metres did the object move?

Answer key

  1. 4
  2. 1120
  3. 3
  4. 3
  5. 250
  6. 100
  7. through a distance
  8. 9
  9. load ÷ effort
  10. 160
  11. 2450
  12. no, work stays the same
  13. 180
  14. 400
  15. joule (J)
  16. 4
  17. 40
  18. 450
  19. 3
  20. 10
  21. 2
  22. 7
  23. 900
  24. 470
  25. 250
  26. 9
  27. 500
  28. 5
  29. 3150
  30. 60
  31. 1610
  32. 600
  33. 10
  34. 640
  35. 420
  36. 4100
  37. 480
  38. 8
  39. 80
  40. 2

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