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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 77 · 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.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  2. 2.🏋️ A force of 310 N did 1240 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  6. 6.🏋️ A machine lifts a load of 240 N when you push with 120 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) the same effort (d) less effort
  8. 8.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 180 N did 1260 J of work. How many metres did the object move?
  10. 10.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Work is done when a force moves something … (a) very slowly (b) without moving it (c) only upwards (d) through a distance
  12. 12.🏋️ Pushing a crate 9 m took 4050 J of work. What force was used, in newtons?
  13. 13.🏋️ 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)
  14. 14.🏋️ Pushing a crate 10 m took 4800 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 3 m took 630 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ A force of 340 N did 3400 J of work. How many metres did the object move?
  19. 19.🏋️ A force of 350 N pushes a cart 2 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 760 N when you push with 190 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Pushing a crate 9 m took 1620 J of work. What force was used, in newtons?
  23. 23.🏋️ A force of 350 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 500 N did 1000 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 150 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ 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?
  27. 27.🏋️ Pushing a crate 3 m took 930 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 310 N did 620 J of work. How many metres did the object move?
  29. 29.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ Pushing a crate 7 m took 490 J of work. What force was used, in newtons?
  33. 33.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 490 N did 4410 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 10 m took 1700 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 330 N pushes a cart 3 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 300 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ Pushing a crate 4 m took 1000 J of work. What force was used, in newtons?
  40. 40.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. 4
  3. 6
  4. 3
  5. no, work stays the same
  6. 2
  7. less effort
  8. 7
  9. 7
  10. 150
  11. through a distance
  12. 450
  13. 100
  14. 480
  15. 480
  16. 210
  17. 350
  18. 10
  19. 700
  20. 750
  21. 4
  22. 180
  23. 3500
  24. 2
  25. 50
  26. 420
  27. 310
  28. 2
  29. 500
  30. 150
  31. 4
  32. 70
  33. 6
  34. 9
  35. 170
  36. 990
  37. 170
  38. 300
  39. 250
  40. 1200

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