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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 977 · 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 force of 190 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 8 m took 1120 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A force of 130 N pushes a cart 6 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 900 N when you push with 180 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Pushing a crate 3 m took 450 J of work. What force was used, in newtons?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  12. 12.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  13. 13.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  14. 14.🏋️ A force of 100 N did 200 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 270 N did 2160 J of work. How many metres did the object move?
  16. 16.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 500 N did 1500 J of work. How many metres did the object move?
  21. 21.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  22. 22.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 210 N pushes a cart 5 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 7 m took 2450 J of work. What force was used, in newtons?
  25. 25.🏋️ Pushing a crate 3 m took 600 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 5 m took 2250 J of work. What force was used, in newtons?
  27. 27.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 360 N did 1440 J of work. How many metres did the object move?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  33. 33.🏋️ A force of 40 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ 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?
  35. 35.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ 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?
  37. 37.🏋️ Pushing a crate 1 m took 30 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 380
  2. 4
  3. 4
  4. 140
  5. 150
  6. 780
  7. 600
  8. 300
  9. 5
  10. 150
  11. load ÷ effort
  12. joule (J)
  13. through a distance
  14. 2
  15. 8
  16. 6
  17. 9
  18. 810
  19. 2
  20. 3
  21. 230
  22. 1000
  23. 1050
  24. 350
  25. 200
  26. 450
  27. 1
  28. 4
  29. 4
  30. 100
  31. 1330
  32. less effort
  33. 200
  34. 450
  35. 4
  36. 560
  37. 30
  38. 480
  39. 90
  40. 200

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