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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 82 · 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.

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  1. 1.🏋️ A force of 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  4. 4.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  5. 5.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A 13 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  8. 8.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  11. 11.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 10 m took 3800 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 7 m took 210 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 170 N did 170 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 390 N pushes a cart 7 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  18. 18.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 220 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ 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)
  24. 24.🏋️ A force of 460 N did 4140 J of work. How many metres did the object move?
  25. 25.🏋️ A 1 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  27. 27.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Pushing a crate 1 m took 10 J of work. What force was used, in newtons?
  29. 29.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 190 N did 950 J of work. How many metres did the object move?
  31. 31.🏋️ Pushing a crate 5 m took 1200 J of work. What force was used, in newtons?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 100 N did 900 J of work. How many metres did the object move?
  37. 37.🏋️ 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)
  38. 38.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 350 N did 2800 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 80 N did 560 J of work. How many metres did the object move?

Answer key

  1. 3870
  2. 1000
  3. 400
  4. through a distance
  5. 300
  6. 650
  7. joule (J)
  8. 6
  9. 4
  10. load ÷ effort
  11. 500
  12. 380
  13. 30
  14. 1
  15. 2730
  16. 600
  17. 1
  18. 320
  19. 660
  20. 220
  21. 60
  22. 800
  23. 950
  24. 9
  25. 50
  26. 280
  27. 90
  28. 10
  29. 400
  30. 5
  31. 240
  32. 60
  33. 2720
  34. 4
  35. 2
  36. 9
  37. 650
  38. 250
  39. 8
  40. 7

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