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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 711 · 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 13 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.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A 19 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 3 m took 1470 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
  11. 11.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  12. 12.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  13. 13.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ 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)
  15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  16. 16.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ 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?
  19. 19.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 320 N pushes a cart 10 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  24. 24.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1350 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  26. 26.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 360 N did 2880 J of work. How many metres did the object move?
  29. 29.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 200 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 10 m took 4200 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  36. 36.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  37. 37.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ Pushing a crate 6 m took 2340 J of work. What force was used, in newtons?
  40. 40.🏋️ 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?

Answer key

  1. 130
  2. 700
  3. 3
  4. 1100
  5. 190
  6. 1300
  7. 490
  8. 50
  9. 420
  10. 6
  11. joule (J)
  12. 210
  13. 800
  14. 200
  15. less effort
  16. 250
  17. 5
  18. 650
  19. 200
  20. 3200
  21. 1290
  22. 350
  23. load ÷ effort
  24. 450
  25. 90
  26. 6
  27. 500
  28. 8
  29. 60
  30. 270
  31. 3920
  32. 1
  33. 200
  34. 420
  35. 3
  36. through a distance
  37. 190
  38. 100
  39. 390
  40. 90

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