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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 439 · 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 6 m took 900 J of work. What force was used, in newtons?
  2. 2.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Pushing a crate 3 m took 1050 J of work. What force was used, in newtons?
  4. 4.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  7. 7.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  8. 8.🏋️ A force of 120 N did 240 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 9 m took 4230 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 70 N did 70 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 5 m took 2300 J of work. What force was used, in newtons?
  14. 14.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ 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)
  16. 16.🏋️ Pushing a crate 3 m took 1440 J of work. What force was used, in newtons?
  17. 17.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  18. 18.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  19. 19.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  20. 20.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 160 N did 160 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ 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)
  29. 29.🏋️ A force of 210 N did 1260 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 3 m took 1290 J of work. What force was used, in newtons?
  31. 31.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A 16 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  37. 37.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  40. 40.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 150
  2. 550
  3. 350
  4. 750
  5. 3
  6. 310
  7. less effort
  8. 2
  9. 80
  10. 470
  11. 1
  12. 600
  13. 460
  14. 240
  15. 450
  16. 480
  17. load ÷ effort
  18. joule (J)
  19. 70
  20. 280
  21. 60
  22. 700
  23. 50
  24. 400
  25. 1
  26. 2
  27. 6
  28. 250
  29. 6
  30. 430
  31. 160
  32. 1000
  33. 2
  34. 720
  35. 800
  36. through a distance
  37. 40
  38. 550
  39. 9
  40. 330

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