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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 522 · 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 force of 190 N did 760 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 250 N did 1250 J of work. How many metres did the object move?
  3. 3.🏋️ 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)
  4. 4.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  5. 5.🏋️ Pushing a crate 5 m took 2400 J of work. What force was used, in newtons?
  6. 6.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  7. 7.🏋️ A longer ramp to the same height needs … (a) less effort (b) no effort (c) the same effort (d) more effort
  8. 8.🏋️ Pushing a crate 2 m took 420 J of work. What force was used, in newtons?
  9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  10. 10.🏋️ 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?
  11. 11.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 200 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 4 m took 1840 J of work. What force was used, in newtons?
  13. 13.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  14. 14.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 280 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 30 N did 210 J of work. How many metres did the object move?
  20. 20.🏋️ 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)
  21. 21.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ Pushing a crate 8 m took 1840 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 500 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 400 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 50 N did 200 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 260 N did 2080 J of work. How many metres did the object move?
  32. 32.🏋️ 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?
  33. 33.🏋️ A machine lifts a load of 480 N when you push with 120 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ 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?
  36. 36.🏋️ A force of 310 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 210 N did 1680 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 360 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 9 m took 270 J of work. What force was used, in newtons?
  40. 40.🏋️ An 18 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. 4
  2. 5
  3. 150
  4. through a distance
  5. 480
  6. no, work stays the same
  7. less effort
  8. 210
  9. joule (J)
  10. 10
  11. 50
  12. 460
  13. 210
  14. 4
  15. 6
  16. 2
  17. 1400
  18. 420
  19. 7
  20. 350
  21. 50
  22. 230
  23. 500
  24. 110
  25. 40
  26. 100
  27. 3200
  28. 460
  29. 2
  30. 4
  31. 8
  32. 200
  33. 4
  34. 6
  35. 40
  36. 3100
  37. 8
  38. 3240
  39. 30
  40. 180

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