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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 442 · 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 smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 280 N did 1120 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 190 N pushes a cart 8 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  6. 6.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  7. 7.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  8. 8.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  13. 13.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 370 N pushes a cart 10 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  16. 16.🏋️ Pushing a crate 10 m took 1300 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 1 m took 70 J of work. What force was used, in newtons?
  19. 19.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ 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?
  22. 22.🏋️ Pushing a crate 2 m took 120 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 410 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 160 N did 480 J of work. How many metres did the object move?
  28. 28.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 190 N did 570 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  33. 33.🏋️ 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?
  34. 34.🏋️ A force of 50 N did 300 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 30 N did 270 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 150
  2. 4
  3. 1520
  4. 4
  5. no, work stays the same
  6. load ÷ effort
  7. joule (J)
  8. 3
  9. 7
  10. 3240
  11. 350
  12. through a distance
  13. 100
  14. 3700
  15. 270
  16. 130
  17. 280
  18. 70
  19. 420
  20. 200
  21. 450
  22. 60
  23. 1640
  24. 2
  25. 220
  26. 300
  27. 3
  28. 450
  29. 3
  30. 750
  31. 5
  32. 420
  33. 320
  34. 6
  35. 300
  36. 300
  37. 400
  38. 9
  39. 5
  40. 650

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