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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 142 · 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 9 m took 90 J of work. What force was used, in newtons?
  2. 2.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  3. 3.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 10 m took 4600 J of work. What force was used, in newtons?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  6. 6.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 90 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 20 N did 200 J of work. How many metres did the object move?
  9. 9.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  10. 10.🏋️ Pushing a crate 4 m took 640 J of work. What force was used, in newtons?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ A force of 430 N pushes a cart 2 m along the floor. How much work is done, in joules?
  13. 13.🏋️ A 17 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A force of 100 N did 400 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 310 N pushes a cart 8 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2200 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  19. 19.🏋️ A longer ramp to the same height needs … (a) the same effort (b) more effort (c) no effort (d) less effort
  20. 20.🏋️ A force of 40 N pushes a cart 4 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 90 N did 180 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 120 N did 720 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 130 N did 130 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ A force of 150 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 30 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 3 m took 570 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  34. 34.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 40 N did 120 J of work. How many metres did the object move?
  36. 36.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 180 N did 540 J of work. How many metres did the object move?
  40. 40.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. 10
  2. through a distance
  3. 2
  4. 460
  5. load ÷ effort
  6. 6
  7. 270
  8. 10
  9. no, work stays the same
  10. 160
  11. 300
  12. 860
  13. 340
  14. 4
  15. 1
  16. 2480
  17. 550
  18. joule (J)
  19. less effort
  20. 160
  21. 2
  22. 6
  23. 1
  24. 3
  25. 1350
  26. 6
  27. 150
  28. 350
  29. 620
  30. 190
  31. 700
  32. 2
  33. 280
  34. 360
  35. 3
  36. 70
  37. 10
  38. 4
  39. 3
  40. 300

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