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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 497 · 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.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  2. 2.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  4. 4.🏋️ 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?
  5. 5.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 410 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 420 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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?
  13. 13.🏋️ A force of 80 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A 1 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 180 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 450 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 490 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A force of 350 N pushes a cart 4 m along the floor. How much work is done, in joules?
  33. 33.🏋️ Pushing a crate 6 m took 2400 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 5 m took 1700 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 460 N pushes a cart 5 m along the floor. How much work is done, in joules?
  38. 38.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ 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?
  40. 40.🏋️ A 5 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. joule (J)
  2. 850
  3. through a distance
  4. 320
  5. 950
  6. 900
  7. 150
  8. 3280
  9. 3
  10. 150
  11. 2940
  12. 190
  13. 240
  14. 70
  15. 1100
  16. 350
  17. 10
  18. 2250
  19. 550
  20. 900
  21. 200
  22. 2450
  23. 80
  24. 180
  25. 120
  26. 4500
  27. 900
  28. 490
  29. 3
  30. 900
  31. 100
  32. 1400
  33. 400
  34. 340
  35. 6
  36. 200
  37. 2300
  38. 360
  39. 650
  40. 50

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