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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 742 · 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.🏋️ Pushing a crate 3 m took 810 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  3. 3.🏋️ A force of 310 N pushes a cart 5 m along the floor. How much work is done, in joules?
  4. 4.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  9. 9.🏋️ Pushing a crate 9 m took 3780 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 9 m took 3960 J of work. What force was used, in newtons?
  11. 11.🏋️ A force of 260 N did 260 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 500 N did 4000 J of work. How many metres did the object move?
  13. 13.🏋️ A force of 390 N did 780 J of work. How many metres did the object move?
  14. 14.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 10 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 490 N pushes a cart 2 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 4 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.🏋️ 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
  19. 19.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
  21. 21.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) metre (m) (d) watt hour
  22. 22.🏋️ A force of 230 N pushes a cart 6 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 440 N when you push with 110 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 140 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 290 N did 290 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 10 m took 1000 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ 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?
  31. 31.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  32. 32.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 180 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 120 N pushes a cart 2 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 13 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A force of 250 N did 750 J of work. How many metres did the object move?
  39. 39.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load ÷ effort (c) load × effort (d) effort ÷ load
  40. 40.🏋️ A force of 450 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 270
  2. 150
  3. 1550
  4. 8
  5. 200
  6. 800
  7. 3
  8. less effort
  9. 420
  10. 440
  11. 1
  12. 8
  13. 2
  14. 1000
  15. 40
  16. 980
  17. 80
  18. no, work stays the same
  19. 360
  20. 10
  21. joule (J)
  22. 1380
  23. 4
  24. 1400
  25. 900
  26. 1
  27. 100
  28. 70
  29. 5
  30. 10
  31. through a distance
  32. 5
  33. 1800
  34. 240
  35. 390
  36. 2
  37. 1000
  38. 3
  39. load ÷ effort
  40. 1350

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