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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 78 · 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 4 m took 440 J of work. What force was used, in newtons?
  2. 2.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ 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)
  6. 6.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  11. 11.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 3 m took 90 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 340 N did 680 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A longer ramp to the same height needs … (a) less effort (b) more effort (c) no effort (d) the same effort
  18. 18.🏋️ A force of 140 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 6 m took 420 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 100 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ 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?
  23. 23.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  26. 26.🏋️ Pushing a crate 2 m took 640 J of work. What force was used, in newtons?
  27. 27.🏋️ 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)
  28. 28.🏋️ Pushing a crate 10 m took 1100 J of work. What force was used, in newtons?
  29. 29.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) effort ÷ load (d) load × effort
  32. 32.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  34. 34.🏋️ 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?
  35. 35.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?

Answer key

  1. 110
  2. 320
  3. 1500
  4. 400
  5. 550
  6. 570
  7. 1120
  8. 20
  9. 60
  10. through a distance
  11. 2
  12. 30
  13. 2
  14. 850
  15. 4
  16. 400
  17. less effort
  18. 420
  19. 250
  20. 70
  21. 200
  22. 80
  23. 640
  24. 150
  25. 3
  26. 320
  27. 800
  28. 110
  29. 640
  30. 750
  31. load ÷ effort
  32. 2
  33. 3
  34. 60
  35. 560
  36. 3
  37. 2250
  38. 2400
  39. 150
  40. 100

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