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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 263 · 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 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  3. 3.🏋️ 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)
  4. 4.🏋️ A force of 90 N pushes a cart 10 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  8. 8.🏋️ A force of 50 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  11. 11.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ Pushing a crate 4 m took 40 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 130 N did 260 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ 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?
  17. 17.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A force of 300 N did 1500 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 290 N did 2900 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ Pushing a crate 5 m took 650 J of work. What force was used, in newtons?
  32. 32.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) yes, always (d) no, work stays the same
  33. 33.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 490 N did 490 J of work. How many metres did the object move?
  39. 39.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ 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?

Answer key

  1. 1000
  2. joule (J)
  3. 800
  4. 900
  5. 240
  6. 6
  7. less effort
  8. 100
  9. 160
  10. through a distance
  11. 5
  12. 4
  13. 10
  14. 2
  15. 140
  16. 50
  17. 420
  18. 5
  19. 1920
  20. 500
  21. 300
  22. 10
  23. 100
  24. 600
  25. 5
  26. 5
  27. 720
  28. 350
  29. 2
  30. 650
  31. 130
  32. no, work stays the same
  33. 1820
  34. 3
  35. 750
  36. 1290
  37. 700
  38. 1
  39. 40
  40. 80

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