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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 40 · 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 100 N did 700 J of work. How many metres did the object move?
  2. 2.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 500 N did 500 J of work. How many metres did the object move?
  5. 5.🏋️ Pushing a crate 10 m took 2300 J of work. What force was used, in newtons?
  6. 6.🏋️ A force of 460 N pushes a cart 1 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  11. 11.🏋️ Pushing a crate 1 m took 330 J of work. What force was used, in newtons?
  12. 12.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 310 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  16. 16.🏋️ Pushing a crate 7 m took 1750 J of work. What force was used, in newtons?
  17. 17.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  18. 18.🏋️ Pushing a crate 8 m took 2480 J of work. What force was used, in newtons?
  19. 19.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  20. 20.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 230 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 120 N did 1080 J of work. How many metres did the object move?
  24. 24.🏋️ A machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  25. 25.🏋️ Pushing a crate 7 m took 2240 J of work. What force was used, in newtons?
  26. 26.🏋️ Pushing a crate 2 m took 560 J of work. What force was used, in newtons?
  27. 27.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  28. 28.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 40 N did 360 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 5 m took 1550 J of work. What force was used, in newtons?
  31. 31.🏋️ Pushing a crate 10 m took 4000 J of work. What force was used, in newtons?
  32. 32.🏋️ A force of 120 N did 480 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 390 N did 3120 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  37. 37.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) only on Mondays (d) no, work stays the same
  39. 39.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  40. 40.🏋️ A force of 80 N did 800 J of work. How many metres did the object move?

Answer key

  1. 7
  2. 6
  3. 2
  4. 1
  5. 230
  6. 460
  7. 480
  8. 440
  9. 30
  10. load ÷ effort
  11. 330
  12. 150
  13. 4
  14. 2790
  15. less effort
  16. 250
  17. 500
  18. 310
  19. through a distance
  20. 210
  21. 620
  22. 2070
  23. 9
  24. 5
  25. 320
  26. 280
  27. 370
  28. 250
  29. 9
  30. 310
  31. 400
  32. 4
  33. 200
  34. 8
  35. 2
  36. 10
  37. 5
  38. no, work stays the same
  39. joule (J)
  40. 10

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