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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 682 · 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) the same effort (b) no effort (c) more effort (d) less effort
  2. 2.🏋️ A force of 30 N did 90 J of work. How many metres did the object move?
  3. 3.🏋️ A machine lifts a load of 120 N when you push with 20 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load + effort (d) load × effort
  5. 5.🏋️ 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)
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Pushing a crate 1 m took 300 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  10. 10.🏋️ Pushing a crate 7 m took 2310 J of work. What force was used, in newtons?
  11. 11.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ In which unit is work measured? (a) watt hour (b) newton (N) (c) metre (m) (d) joule (J)
  13. 13.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 260 N did 780 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 210 N pushes a cart 1 m along the floor. How much work is done, in joules?
  16. 16.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) yes, by half (d) only on Mondays
  18. 18.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A force of 350 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 6 m took 1260 J of work. What force was used, in newtons?
  21. 21.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 270 N pushes a cart 5 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  24. 24.🏋️ Pushing a crate 5 m took 1100 J of work. What force was used, in newtons?
  25. 25.🏋️ 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?
  26. 26.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
  27. 27.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ Pushing a crate 4 m took 720 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 140 N pushes a cart 1 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 9 m took 450 J of work. What force was used, in newtons?
  33. 33.🏋️ 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)
  34. 34.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  35. 35.🏋️ Pushing a crate 1 m took 400 J of work. What force was used, in newtons?
  36. 36.🏋️ A 14 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A 14 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 290 N pushes a cart 6 m along the floor. How much work is done, in joules?
  40. 40.🏋️ 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)

Answer key

  1. less effort
  2. 3
  3. 6
  4. load ÷ effort
  5. 200
  6. 200
  7. 300
  8. 440
  9. 360
  10. 330
  11. 4
  12. joule (J)
  13. 160
  14. 3
  15. 210
  16. 250
  17. no, work stays the same
  18. 3
  19. 2100
  20. 210
  21. 2
  22. 1350
  23. 5
  24. 220
  25. 800
  26. through a distance
  27. 550
  28. 950
  29. 180
  30. 450
  31. 140
  32. 50
  33. 250
  34. 7
  35. 400
  36. 700
  37. 900
  38. 280
  39. 1740
  40. 250

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