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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 875 · 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 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  3. 3.🏋️ Pushing a crate 9 m took 4410 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ Pushing a crate 2 m took 60 J of work. What force was used, in newtons?
  7. 7.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ Pushing a crate 5 m took 2050 J of work. What force was used, in newtons?
  9. 9.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 6 m took 900 J of work. What force was used, in newtons?
  11. 11.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  12. 12.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  14. 14.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ 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?
  16. 16.🏋️ A force of 110 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  20. 20.🏋️ 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)
  21. 21.🏋️ 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)
  22. 22.🏋️ Pushing a crate 9 m took 900 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ 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
  26. 26.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  29. 29.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 8 m took 3680 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 330 N did 990 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 8 m took 2800 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  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. 50
  2. joule (J)
  3. 490
  4. 1080
  5. 3600
  6. 30
  7. 4
  8. 410
  9. 750
  10. 150
  11. 150
  12. 5
  13. less effort
  14. 3
  15. 450
  16. 990
  17. 600
  18. 950
  19. load ÷ effort
  20. 750
  21. 300
  22. 100
  23. 2
  24. 400
  25. no, work stays the same
  26. 800
  27. 150
  28. through a distance
  29. 100
  30. 900
  31. 1440
  32. 60
  33. 460
  34. 70
  35. 3
  36. 250
  37. 60
  38. 350
  39. 3
  40. 100

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