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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 754 · 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) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  2. 2.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Pushing a crate 3 m took 540 J of work. What force was used, in newtons?
  5. 5.🏋️ 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?
  6. 6.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  11. 11.🏋️ Pushing a crate 7 m took 2870 J of work. What force was used, in newtons?
  12. 12.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  15. 15.🏋️ A force of 230 N did 460 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 8 m took 3840 J of work. What force was used, in newtons?
  17. 17.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 4 m took 1560 J of work. What force was used, in newtons?
  19. 19.🏋️ A machine lifts a load of 380 N when you push with 190 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 90 N when you push with 30 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A 9 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) very slowly (d) only upwards
  25. 25.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) no, work stays the same (d) yes, by half
  26. 26.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  27. 27.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  29. 29.🏋️ A force of 440 N pushes a cart 1 m along the floor. How much work is done, in joules?
  30. 30.🏋️ 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?
  31. 31.🏋️ A force of 390 N did 1170 J of work. How many metres did the object move?
  32. 32.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  35. 35.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1250 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 400 N did 2800 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 470 N pushes a cart 6 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. 350
  3. 700
  4. 180
  5. 10
  6. 750
  7. 320
  8. 900
  9. 6
  10. 810
  11. 410
  12. 280
  13. 1230
  14. less effort
  15. 2
  16. 480
  17. 410
  18. 390
  19. 2
  20. 50
  21. 3
  22. 5
  23. 450
  24. through a distance
  25. no, work stays the same
  26. 1
  27. 2
  28. load ÷ effort
  29. 440
  30. 390
  31. 3
  32. 550
  33. 2
  34. 310
  35. 250
  36. 3
  37. 390
  38. 7
  39. 1
  40. 2820

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