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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 819 · 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 longer ramp to the same height needs … (a) less effort (b) the same effort (c) no effort (d) more effort
  2. 2.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  3. 3.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 450 N pushes a cart 9 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 400 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 440 N did 440 J of work. How many metres did the object move?
  8. 8.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) load × effort (c) effort ÷ load (d) load ÷ effort
  9. 9.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 440 N pushes a cart 3 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  13. 13.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 100 N pushes a cart 3 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ A 12 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  21. 21.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ An 18 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  26. 26.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A force of 500 N pushes a cart 8 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 190 N did 760 J of work. How many metres did the object move?
  29. 29.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) only on Mondays (c) yes, by half (d) no, work stays the same
  30. 30.🏋️ A force of 460 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 320 N did 320 J of work. How many metres did the object move?
  33. 33.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A 15 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 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 360 N did 360 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 320 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ Pushing a crate 2 m took 480 J of work. What force was used, in newtons?

Answer key

  1. less effort
  2. joule (J)
  3. 5
  4. 4050
  5. 2
  6. 800
  7. 1
  8. load ÷ effort
  9. 250
  10. 300
  11. 1320
  12. 350
  13. 800
  14. 80
  15. 50
  16. 1
  17. 300
  18. 200
  19. 600
  20. through a distance
  21. 150
  22. 540
  23. 320
  24. 5
  25. 330
  26. 600
  27. 4000
  28. 4
  29. no, work stays the same
  30. 3680
  31. 150
  32. 1
  33. 3
  34. 300
  35. 200
  36. 1
  37. 1280
  38. 3600
  39. 750
  40. 240

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