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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 200 · 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 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?
  2. 2.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ Pushing a crate 4 m took 1160 J of work. What force was used, in newtons?
  4. 4.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
  5. 5.🏋️ A 12 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  7. 7.🏋️ A machine lifts a load of 150 N when you push with 30 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?
  9. 9.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  10. 10.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  12. 12.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  14. 14.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  15. 15.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  16. 16.🏋️ A force of 250 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A 2 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 150 N did 150 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
  21. 21.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3250 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 8 m took 2800 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 170 N pushes a cart 4 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  29. 29.🏋️ A 3 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 12 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 310 N did 2480 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  36. 36.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ Pushing a crate 10 m took 2700 J of work. What force was used, in newtons?
  38. 38.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 300 N did 1800 J of work. How many metres did the object move?

Answer key

  1. 450
  2. 6
  3. 290
  4. 4
  5. 360
  6. through a distance
  7. 5
  8. 2800
  9. joule (J)
  10. 1980
  11. load ÷ effort
  12. 2
  13. 100
  14. no, work stays the same
  15. 440
  16. 2250
  17. 120
  18. 60
  19. 1
  20. 5
  21. 600
  22. 400
  23. 650
  24. 350
  25. 10
  26. 680
  27. 2
  28. 270
  29. 60
  30. 480
  31. 150
  32. 8
  33. 3
  34. 600
  35. less effort
  36. 150
  37. 270
  38. 2
  39. 4
  40. 6

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