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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 261 · 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 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ 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?
  3. 3.🏋️ A force of 390 N did 1560 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  5. 5.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) joule (J) (d) watt hour
  7. 7.🏋️ Pushing a crate 8 m took 3280 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 390 N pushes a cart 10 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 190 N did 1710 J of work. How many metres did the object move?
  10. 10.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 480 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ Pushing a crate 7 m took 1470 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 480 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ Pushing a crate 1 m took 60 J of work. What force was used, in newtons?
  16. 16.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) very slowly (d) through a distance
  17. 17.🏋️ Pushing a crate 9 m took 1440 J of work. What force was used, in newtons?
  18. 18.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  20. 20.🏋️ 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?
  21. 21.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  22. 22.🏋️ Pushing a crate 10 m took 5000 J of work. What force was used, in newtons?
  23. 23.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  24. 24.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  26. 26.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 190 N did 1520 J of work. How many metres did the object move?
  28. 28.🏋️ A 13 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A 4 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.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Pushing a crate 6 m took 1680 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 330 N did 2310 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 440 N pushes a cart 9 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 180 N did 1800 J of work. How many metres did the object move?

Answer key

  1. 150
  2. 340
  3. 4
  4. 8
  5. 5
  6. joule (J)
  7. 410
  8. 3900
  9. 9
  10. 40
  11. 400
  12. 3840
  13. 210
  14. 1440
  15. 60
  16. through a distance
  17. 160
  18. 760
  19. 3
  20. 20
  21. 490
  22. 500
  23. no, work stays the same
  24. 50
  25. load ÷ effort
  26. 7
  27. 8
  28. 520
  29. 2
  30. 40
  31. 550
  32. 280
  33. 400
  34. 460
  35. 3
  36. 1
  37. 7
  38. 3960
  39. 150
  40. 10

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