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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 314 · 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) no effort (b) more effort (c) less effort (d) the same effort
  2. 2.🏋️ A force of 340 N pushes a cart 8 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 160 N pushes a cart 2 m along the floor. How much work is done, in joules?
  4. 4.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  6. 6.🏋️ A force of 230 N did 690 J of work. How many metres did the object move?
  7. 7.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 60 N pushes a cart 2 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 160 N did 1120 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  18. 18.🏋️ A 4 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  23. 23.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A force of 60 N did 60 J of work. How many metres did the object move?
  26. 26.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 19 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) no, work stays the same (c) only on Mondays (d) yes, always
  29. 29.🏋️ A force of 200 N pushes a cart 2 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 80 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 700 N when you push with 140 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 130 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 470 N did 4700 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  36. 36.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 200 N pushes a cart 4 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 2720
  3. 320
  4. joule (J)
  5. load ÷ effort
  6. 3
  7. 3
  8. 5
  9. 700
  10. 120
  11. 100
  12. 440
  13. 5
  14. 8
  15. 7
  16. 60
  17. 6
  18. 80
  19. 2
  20. 6
  21. 4
  22. through a distance
  23. 700
  24. 700
  25. 1
  26. 140
  27. 380
  28. no, work stays the same
  29. 400
  30. 160
  31. 1330
  32. 5
  33. 390
  34. 10
  35. 300
  36. 700
  37. 60
  38. 450
  39. 300
  40. 800

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