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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 189 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  2. 2.🏋️ Pushing a crate 4 m took 1920 J of work. What force was used, in newtons?
  3. 3.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 210 N did 1680 J of work. How many metres did the object move?
  6. 6.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 9 m took 540 J of work. What force was used, in newtons?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) only on Mondays (d) no, work stays the same
  11. 11.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 240 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 8 m took 1440 J of work. What force was used, in newtons?
  15. 15.🏋️ Pushing a crate 2 m took 580 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  17. 17.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  18. 18.🏋️ A force of 260 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 8 m took 80 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 180 N did 1260 J of work. How many metres did the object move?
  22. 22.🏋️ 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?
  23. 23.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 2 m took 300 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 150 N pushes a cart 7 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 480 N pushes a cart 4 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 320 N did 960 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  33. 33.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 1 m took 80 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 4 m took 480 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 1 m took 160 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. joule (J)
  2. 480
  3. 750
  4. 850
  5. 8
  6. 20
  7. load ÷ effort
  8. 400
  9. 60
  10. no, work stays the same
  11. 7
  12. 450
  13. 480
  14. 180
  15. 290
  16. 140
  17. through a distance
  18. 520
  19. 10
  20. 2
  21. 7
  22. 40
  23. 1
  24. 380
  25. 150
  26. 1050
  27. 600
  28. 600
  29. 1920
  30. 120
  31. 3
  32. 270
  33. 1850
  34. 80
  35. 120
  36. 160
  37. 3
  38. 4
  39. 500
  40. 100

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