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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 86 · 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 smooth ramp is 3 m long and rises 1 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  3. 3.🏋️ A force of 110 N pushes a cart 3 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 80 N when you push with 20 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  9. 9.🏋️ A force of 280 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ Pushing a crate 4 m took 1600 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 290 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  14. 14.🏋️ An 11 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  17. 17.🏋️ A force of 350 N pushes a cart 1 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 60 N pushes a cart 7 m along the floor. How much work is done, in joules?
  21. 21.🏋️ 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?
  22. 22.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 40 N did 80 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 280 N pushes a cart 5 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 7 m took 3010 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 4 m took 560 J of work. What force was used, in newtons?
  30. 30.🏋️ Pushing a crate 1 m took 220 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1950 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 1 m took 190 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 5 m took 2500 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 6 m took 60 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  39. 39.🏋️ Pushing a crate 4 m took 280 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 120 N did 360 J of work. How many metres did the object move?

Answer key

  1. 300
  2. 2
  3. 330
  4. 4
  5. 4
  6. 3
  7. 50
  8. joule (J)
  9. 280
  10. 400
  11. 870
  12. 600
  13. 150
  14. 440
  15. 150
  16. no, work stays the same
  17. 350
  18. 140
  19. 5
  20. 420
  21. 150
  22. 700
  23. 2
  24. 1400
  25. 4
  26. 6
  27. 1550
  28. 430
  29. 140
  30. 220
  31. 650
  32. 190
  33. 2
  34. 500
  35. 10
  36. 6
  37. 600
  38. through a distance
  39. 70
  40. 3

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