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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 54 · 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.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A force of 270 N pushes a cart 10 m along the floor. How much work is done, in joules?
  4. 4.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  5. 5.🏋️ Pushing a crate 2 m took 140 J of work. What force was used, in newtons?
  6. 6.🏋️ A 15 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 smooth ramp is 5 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ Pushing a crate 4 m took 1880 J of work. What force was used, in newtons?
  9. 9.🏋️ Pushing a crate 2 m took 760 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 330 N pushes a cart 10 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  14. 14.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  16. 16.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 60 N did 540 J of work. How many metres did the object move?
  19. 19.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 330 N did 330 J of work. How many metres did the object move?
  22. 22.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ Pushing a crate 9 m took 360 J of work. What force was used, in newtons?
  24. 24.🏋️ Pushing a crate 6 m took 1920 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 350 N pushes a cart 7 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 410 N did 1640 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 180 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A 10 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A 17 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ 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?
  33. 33.🏋️ A force of 270 N did 1620 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 5 m took 400 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 400 N did 2000 J of work. How many metres did the object move?
  39. 39.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 400 N did 1200 J of work. How many metres did the object move?

Answer key

  1. 800
  2. 550
  3. 2700
  4. joule (J)
  5. 70
  6. 450
  7. 600
  8. 470
  9. 380
  10. 4
  11. 3300
  12. 130
  13. load ÷ effort
  14. no, work stays the same
  15. through a distance
  16. 400
  17. 2
  18. 9
  19. 2
  20. 900
  21. 1
  22. 3
  23. 40
  24. 320
  25. 2450
  26. 4
  27. 1800
  28. 200
  29. 380
  30. 1020
  31. 510
  32. 190
  33. 6
  34. 80
  35. 3
  36. 100
  37. 100
  38. 5
  39. 110
  40. 3

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