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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 658 · 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.🏋️ Pushing a crate 9 m took 1710 J of work. What force was used, in newtons?
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Pushing a crate 1 m took 270 J of work. What force was used, in newtons?
  4. 4.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  5. 5.🏋️ Pushing a crate 6 m took 1200 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  7. 7.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 5 m took 1350 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 70 N pushes a cart 5 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1050 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  18. 18.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  20. 20.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  21. 21.🏋️ A force of 340 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ Pushing a crate 6 m took 1380 J of work. What force was used, in newtons?
  23. 23.🏋️ 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)
  24. 24.🏋️ A force of 180 N did 1080 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  28. 28.🏋️ A force of 20 N did 60 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  31. 31.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  34. 34.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 400 N did 800 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?

Answer key

  1. 190
  2. 50
  3. 270
  4. no, work stays the same
  5. 200
  6. load ÷ effort
  7. 250
  8. 270
  9. 2
  10. 4
  11. 350
  12. 150
  13. 240
  14. 3
  15. 350
  16. 300
  17. less effort
  18. 220
  19. 60
  20. joule (J)
  21. 680
  22. 230
  23. 450
  24. 6
  25. 5
  26. 60
  27. 10
  28. 3
  29. 270
  30. 9
  31. 2
  32. 300
  33. through a distance
  34. 10
  35. 7
  36. 350
  37. 310
  38. 2
  39. 1
  40. 470

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