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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 725 · 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.🏋️ 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
  2. 2.🏋️ Pushing a crate 4 m took 440 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 300 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 500 N pushes a cart 6 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  9. 9.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Pushing a crate 3 m took 1110 J of work. What force was used, in newtons?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) load ÷ effort (d) effort ÷ load
  14. 14.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  15. 15.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1700 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  21. 21.🏋️ Pushing a crate 6 m took 540 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 10 m took 100 J of work. What force was used, in newtons?
  23. 23.🏋️ A 16 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  26. 26.🏋️ A force of 290 N did 1740 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 1 m took 310 J of work. What force was used, in newtons?
  28. 28.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  30. 30.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  31. 31.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 500 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
  34. 34.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A machine lifts a load of 480 N when you push with 160 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 1 m took 340 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 320 N pushes a cart 9 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 410 N did 410 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?

Answer key

  1. no, work stays the same
  2. 110
  3. 2
  4. 2100
  5. 550
  6. 250
  7. 3000
  8. 450
  9. 5
  10. 2
  11. 450
  12. 370
  13. load ÷ effort
  14. through a distance
  15. 3
  16. 850
  17. 2
  18. 2640
  19. 60
  20. joule (J)
  21. 90
  22. 10
  23. 160
  24. 6
  25. 380
  26. 6
  27. 310
  28. 5
  29. 5
  30. less effort
  31. 2
  32. 3500
  33. 5
  34. 5
  35. 3
  36. 340
  37. 2880
  38. 50
  39. 1
  40. 8

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