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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 421 · 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.🏋️ Pushing a crate 3 m took 390 J of work. What force was used, in newtons?
  2. 2.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Work is done when a force moves something … (a) through a distance (b) very slowly (c) without moving it (d) only upwards
  5. 5.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 240 N did 1200 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 360 N did 3600 J of work. How many metres did the object move?
  10. 10.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A longer ramp to the same height needs … (a) the same effort (b) no effort (c) less effort (d) more effort
  14. 14.🏋️ Pushing a crate 3 m took 360 J of work. What force was used, in newtons?
  15. 15.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  16. 16.🏋️ A force of 230 N did 230 J of work. How many metres did the object move?
  17. 17.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) metre (m) (d) joule (J)
  18. 18.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  20. 20.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 320 N did 1600 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 150 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 190 N pushes a cart 7 m along the floor. How much work is done, in joules?
  24. 24.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 420 N pushes a cart 8 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 420 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) effort ÷ load (d) load ÷ effort
  33. 33.🏋️ A force of 150 N did 1500 J of work. How many metres did the object move?
  34. 34.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 450 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 130
  2. 2
  3. 3
  4. through a distance
  5. 5
  6. 3
  7. 1920
  8. 5
  9. 10
  10. 6
  11. 4
  12. 250
  13. less effort
  14. 120
  15. 330
  16. 1
  17. joule (J)
  18. 100
  19. no, work stays the same
  20. 160
  21. 5
  22. 1350
  23. 1330
  24. 330
  25. 5
  26. 3360
  27. 490
  28. 840
  29. 6
  30. 1610
  31. 1000
  32. load ÷ effort
  33. 10
  34. 120
  35. 3600
  36. 720
  37. 350
  38. 2
  39. 750
  40. 1760

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