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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 363 · 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 machine lifts a load of 200 N when you push with 40 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  4. 4.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  5. 5.🏋️ Pushing a crate 7 m took 1120 J of work. What force was used, in newtons?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load ÷ effort (d) load × effort
  7. 7.🏋️ A 20 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A force of 470 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 20 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 400 N did 1600 J of work. How many metres did the object move?
  12. 12.🏋️ Pushing a crate 3 m took 1170 J of work. What force was used, in newtons?
  13. 13.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  14. 14.🏋️ A force of 410 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 3900 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 150 N pushes a cart 1 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) more effort (c) the same effort (d) less effort
  19. 19.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  22. 22.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A force of 50 N did 350 J of work. How many metres did the object move?
  24. 24.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 10 N pushes a cart 2 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  28. 28.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A machine lifts a load of 450 N when you push with 90 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ 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)
  32. 32.🏋️ An 8 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ 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
  35. 35.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 4000 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  37. 37.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 170 N did 340 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 100 N did 800 J of work. How many metres did the object move?
  40. 40.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 5
  2. 1080
  3. 3
  4. joule (J)
  5. 160
  6. load ÷ effort
  7. 800
  8. 940
  9. 10
  10. 10
  11. 4
  12. 390
  13. through a distance
  14. 1230
  15. 650
  16. 540
  17. 150
  18. less effort
  19. 950
  20. 250
  21. 240
  22. 200
  23. 7
  24. 300
  25. 5
  26. 20
  27. 4
  28. 3
  29. 250
  30. 5
  31. 350
  32. 240
  33. 2
  34. no, work stays the same
  35. 1000
  36. 140
  37. 960
  38. 2
  39. 8
  40. 550

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