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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 974 · 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 2610 J of work. What force was used, in newtons?
  2. 2.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  3. 3.🏋️ A machine lifts a load of 240 N when you push with 80 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  5. 5.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A force of 170 N did 170 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 9 m took 2970 J of work. What force was used, in newtons?
  11. 11.🏋️ A 3 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  15. 15.🏋️ Pushing a crate 8 m took 240 J of work. What force was used, in newtons?
  16. 16.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ 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?
  18. 18.🏋️ 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?
  19. 19.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  22. 22.🏋️ Pushing a crate 10 m took 4900 J of work. What force was used, in newtons?
  23. 23.🏋️ Pushing a crate 2 m took 720 J of work. What force was used, in newtons?
  24. 24.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ Pushing a crate 9 m took 2520 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  29. 29.🏋️ A machine lifts a load of 350 N when you push with 70 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  31. 31.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 9 m took 2430 J of work. What force was used, in newtons?
  33. 33.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  34. 34.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 430 N did 1720 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 160 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  40. 40.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?

Answer key

  1. 290
  2. less effort
  3. 3
  4. joule (J)
  5. 7
  6. 650
  7. 260
  8. 3
  9. 1
  10. 330
  11. 60
  12. 6
  13. 950
  14. 1
  15. 30
  16. 2
  17. 200
  18. 100
  19. 2
  20. 5
  21. through a distance
  22. 490
  23. 360
  24. 5
  25. 460
  26. 50
  27. 280
  28. 290
  29. 5
  30. load ÷ effort
  31. 3
  32. 270
  33. no, work stays the same
  34. 700
  35. 4
  36. 10
  37. 650
  38. 1280
  39. 4
  40. 250

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