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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 114 · 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 force of 490 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  3. 3.🏋️ 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?
  4. 4.🏋️ A force of 240 N did 1920 J of work. How many metres did the object move?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  6. 6.🏋️ A force of 240 N did 960 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 6 m took 1560 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 380 N did 380 J of work. How many metres did the object move?
  9. 9.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  11. 11.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 8 m took 3520 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ A force of 120 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A force of 370 N did 1850 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  22. 22.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 80 N pushes a cart 4 m along the floor. How much work is done, in joules?
  26. 26.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) joule (J) (d) metre (m)
  27. 27.🏋️ A force of 270 N pushes a cart 9 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 2 m took 200 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 3 m took 330 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 410 N pushes a cart 1 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 560 N when you push with 140 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 130 N did 780 J of work. How many metres did the object move?
  33. 33.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5100 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  37. 37.🏋️ Pushing a crate 8 m took 1600 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 6 m took 1500 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 3 m took 420 J of work. What force was used, in newtons?

Answer key

  1. 4900
  2. 120
  3. 120
  4. 8
  5. load ÷ effort
  6. 4
  7. 260
  8. 1
  9. 2
  10. no, work stays the same
  11. 50
  12. 440
  13. 220
  14. 1000
  15. 1200
  16. 2
  17. 460
  18. 850
  19. 5
  20. 4
  21. through a distance
  22. 280
  23. 4
  24. 9
  25. 320
  26. joule (J)
  27. 2430
  28. 100
  29. 110
  30. 410
  31. 4
  32. 6
  33. 120
  34. 850
  35. 20
  36. 2
  37. 200
  38. 250
  39. 750
  40. 140

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