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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 352 · 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.

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  1. 1.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  2. 2.🏋️ A 10 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) only on Mondays (c) no, work stays the same (d) yes, always
  4. 4.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  6. 6.🏋️ A force of 170 N did 1190 J of work. How many metres did the object move?
  7. 7.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  8. 8.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 270 N pushes a cart 1 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A 2 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 130 N did 1300 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ 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?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 340 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) more effort (d) less effort
  19. 19.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) without moving it (d) only upwards
  21. 21.🏋️ A force of 320 N pushes a cart 8 m along the floor. How much work is done, in joules?
  22. 22.🏋️ 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?
  23. 23.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 900 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 2 m took 1000 J of work. What force was used, in newtons?
  25. 25.🏋️ 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?
  26. 26.🏋️ A machine lifts a load of 1080 N when you push with 180 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ Pushing a crate 10 m took 3400 J of work. What force was used, in newtons?
  28. 28.🏋️ A force of 320 N pushes a cart 5 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  30. 30.🏋️ A force of 340 N did 340 J of work. How many metres did the object move?
  31. 31.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  32. 32.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 410 N pushes a cart 9 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 1 m took 110 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A force of 440 N pushes a cart 10 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 430 N did 1290 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 100 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 60 N did 480 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 180 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. 500
  2. 500
  3. no, work stays the same
  4. 850
  5. 8
  6. 7
  7. load ÷ effort
  8. 880
  9. 270
  10. 40
  11. 10
  12. 40
  13. 3
  14. 150
  15. 300
  16. 2
  17. 2380
  18. less effort
  19. 1000
  20. through a distance
  21. 2560
  22. 80
  23. 150
  24. 500
  25. 100
  26. 6
  27. 340
  28. 1600
  29. 90
  30. 1
  31. joule (J)
  32. 300
  33. 3690
  34. 110
  35. 810
  36. 4400
  37. 3
  38. 100
  39. 8
  40. 1260

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