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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 25 · 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) more effort (b) the same effort (c) less effort (d) no effort
  2. 2.🏋️ A force of 140 N did 140 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  5. 5.🏋️ A force of 480 N pushes a cart 2 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  7. 7.🏋️ 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
  8. 8.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ A force of 440 N did 4400 J of work. How many metres did the object move?
  10. 10.🏋️ Pushing a crate 10 m took 2900 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 720 N when you push with 180 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ An 18 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 230 N pushes a cart 3 m along the floor. How much work is done, in joules?
  14. 14.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 290 N did 2610 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 230 N pushes a cart 9 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  18. 18.🏋️ 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?
  19. 19.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 1 m took 460 J of work. What force was used, in newtons?
  22. 22.🏋️ A force of 40 N did 320 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 500 N pushes a cart 10 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 440 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  26. 26.🏋️ A force of 10 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  28. 28.🏋️ A force of 490 N did 1470 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A force of 360 N did 1080 J of work. How many metres did the object move?
  31. 31.🏋️ A force of 440 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 5 m took 750 J of work. What force was used, in newtons?
  33. 33.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ An 11 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 60 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  38. 38.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A machine lifts a load of 1020 N when you push with 170 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 160 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 1
  3. 150
  4. load ÷ effort
  5. 960
  6. 640
  7. no, work stays the same
  8. 300
  9. 10
  10. 290
  11. 4
  12. 900
  13. 690
  14. 320
  15. 9
  16. 2070
  17. 1100
  18. 80
  19. 650
  20. 200
  21. 460
  22. 8
  23. 5000
  24. 3520
  25. joule (J)
  26. 30
  27. through a distance
  28. 3
  29. 2960
  30. 3
  31. 440
  32. 150
  33. 240
  34. 550
  35. 480
  36. 4
  37. 60
  38. 200
  39. 6
  40. 800

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