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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 690 · 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 4 m took 1440 J of work. What force was used, in newtons?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  3. 3.🏋️ A 19 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Pushing a crate 2 m took 40 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 470 N did 1410 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  9. 9.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  11. 11.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  13. 13.🏋️ 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?
  14. 14.🏋️ A force of 400 N pushes a cart 1 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 100 N pushes a cart 9 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  19. 19.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ 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)
  21. 21.🏋️ A force of 20 N did 120 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ 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?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  27. 27.🏋️ A force of 70 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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)
  29. 29.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  30. 30.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  33. 33.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ Pushing a crate 10 m took 3300 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 310 N did 1860 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ Pushing a crate 9 m took 1800 J of work. What force was used, in newtons?

Answer key

  1. 360
  2. load ÷ effort
  3. 950
  4. 5
  5. 20
  6. 300
  7. 3
  8. 30
  9. 70
  10. joule (J)
  11. 200
  12. 290
  13. 640
  14. 400
  15. 900
  16. 4
  17. 350
  18. less effort
  19. 4
  20. 350
  21. 6
  22. 5
  23. 200
  24. 700
  25. 980
  26. no, work stays the same
  27. 280
  28. 750
  29. through a distance
  30. 180
  31. 5
  32. 340
  33. 200
  34. 180
  35. 300
  36. 80
  37. 330
  38. 6
  39. 60
  40. 200

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