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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 220 · 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 force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  2. 2.🏋️ 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
  3. 3.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  4. 4.🏋️ A force of 140 N did 1120 J of work. How many metres did the object move?
  5. 5.🏋️ A force of 380 N did 1140 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 30 N did 150 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 6 m took 2100 J of work. What force was used, in newtons?
  8. 8.🏋️ Pushing a crate 1 m took 130 J of work. What force was used, in newtons?
  9. 9.🏋️ A 5 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ 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?
  13. 13.🏋️ A force of 140 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) more effort (d) less effort
  15. 15.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 10 N pushes a cart 6 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  20. 20.🏋️ A force of 200 N did 1000 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  23. 23.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  24. 24.🏋️ A force of 30 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A force of 200 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
  30. 30.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 50 N did 150 J of work. How many metres did the object move?
  34. 34.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  38. 38.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ 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?

Answer key

  1. 220
  2. no, work stays the same
  3. joule (J)
  4. 8
  5. 3
  6. 5
  7. 350
  8. 130
  9. 250
  10. 40
  11. 5
  12. 150
  13. 420
  14. less effort
  15. 90
  16. 60
  17. 80
  18. 100
  19. 10
  20. 5
  21. 1000
  22. through a distance
  23. load ÷ effort
  24. 60
  25. 740
  26. 40
  27. 1000
  28. 4
  29. 5
  30. 1100
  31. 6
  32. 1200
  33. 3
  34. 150
  35. 3
  36. 900
  37. 2
  38. 5
  39. 540
  40. 510

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