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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 410 · 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.🏋️ In which unit is work measured? (a) joule (J) (b) newton (N) (c) watt hour (d) metre (m)
  2. 2.🏋️ A 5 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ 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)
  6. 6.🏋️ Pushing a crate 9 m took 990 J of work. What force was used, in newtons?
  7. 7.🏋️ A force of 20 N pushes a cart 7 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  9. 9.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) through a distance (d) very slowly
  10. 10.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Pushing a crate 7 m took 1540 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  16. 16.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 140 N pushes a cart 6 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 4 m took 840 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 390 N pushes a cart 5 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  22. 22.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 130 N pushes a cart 4 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 480 N did 960 J of work. How many metres did the object move?
  31. 31.🏋️ A 14 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A 12 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 force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 40 N did 280 J of work. How many metres did the object move?
  36. 36.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 60 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. 150
  3. 150
  4. 4
  5. 800
  6. 110
  7. 140
  8. 150
  9. through a distance
  10. 500
  11. 220
  12. 800
  13. 3
  14. 1200
  15. load ÷ effort
  16. 10
  17. 840
  18. 210
  19. 1950
  20. 4
  21. less effort
  22. 2
  23. 520
  24. 1000
  25. 200
  26. 600
  27. 80
  28. 3
  29. 300
  30. 2
  31. 560
  32. 600
  33. 880
  34. 200
  35. 7
  36. 480
  37. 200
  38. 60
  39. 10
  40. 150

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