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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 203 · 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 270 N did 1620 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 50 N pushes a cart 6 m along the floor. How much work is done, in joules?
  3. 3.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) through a distance (d) only upwards
  4. 4.🏋️ Pushing a crate 2 m took 660 J of work. What force was used, in newtons?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) effort ÷ load (c) load + effort (d) load ÷ effort
  6. 6.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 370 N pushes a cart 5 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A 15 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  10. 10.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 180 N when you push with 30 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A 2 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 210 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A 20 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 40 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 10 N did 60 J of work. How many metres did the object move?
  20. 20.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ 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
  23. 23.🏋️ A force of 70 N pushes a cart 1 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 70 N pushes a cart 3 m along the floor. How much work is done, in joules?
  28. 28.🏋️ 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?
  29. 29.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  30. 30.🏋️ A force of 100 N did 600 J of work. How many metres did the object move?
  31. 31.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 8 m took 1680 J of work. What force was used, in newtons?
  34. 34.🏋️ A 14 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 smooth ramp is 12 m long and rises 3 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 110 N did 440 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 30 N pushes a cart 10 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?

Answer key

  1. 6
  2. 300
  3. through a distance
  4. 330
  5. load ÷ effort
  6. 6
  7. 1850
  8. 150
  9. less effort
  10. 200
  11. 6
  12. 100
  13. 2100
  14. 400
  15. 200
  16. 4
  17. 360
  18. 2
  19. 6
  20. 50
  21. 2
  22. no, work stays the same
  23. 70
  24. 500
  25. 250
  26. 6
  27. 210
  28. 80
  29. joule (J)
  30. 6
  31. 60
  32. 3
  33. 210
  34. 280
  35. 200
  36. 6
  37. 170
  38. 4
  39. 300
  40. 2

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