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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 651 · 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 smooth ramp is 4 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A 6 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  6. 6.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 140 N pushes a cart 2 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A force of 190 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  10. 10.🏋️ Pushing a crate 1 m took 320 J of work. What force was used, in newtons?
  11. 11.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  12. 12.🏋️ Pushing a crate 1 m took 50 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 480 N pushes a cart 1 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 190 N did 380 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 430 N did 3010 J of work. How many metres did the object move?
  17. 17.🏋️ A 7 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 2380 J of work. What force was used, in newtons?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, by half (d) yes, always
  20. 20.🏋️ Pushing a crate 9 m took 3330 J of work. What force was used, in newtons?
  21. 21.🏋️ A force of 420 N pushes a cart 5 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A 12 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 400 N did 4000 J of work. How many metres did the object move?
  25. 25.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A force of 230 N did 2070 J of work. How many metres did the object move?
  27. 27.🏋️ Pushing a crate 5 m took 950 J of work. What force was used, in newtons?
  28. 28.🏋️ A 7 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A machine lifts a load of 320 N when you push with 160 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 480 N did 3360 J of work. How many metres did the object move?
  32. 32.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  33. 33.🏋️ Pushing a crate 8 m took 400 J of work. What force was used, in newtons?
  34. 34.🏋️ A machine lifts a load of 540 N when you push with 180 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1750 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ Pushing a crate 4 m took 160 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 3 m took 270 J of work. What force was used, in newtons?
  39. 39.🏋️ 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?
  40. 40.🏋️ A force of 190 N did 1140 J of work. How many metres did the object move?

Answer key

  1. less effort
  2. 900
  3. 300
  4. 2
  5. load ÷ effort
  6. 3
  7. 280
  8. 570
  9. 20
  10. 320
  11. joule (J)
  12. 50
  13. 480
  14. 2
  15. 600
  16. 7
  17. 140
  18. 340
  19. no, work stays the same
  20. 370
  21. 2100
  22. 250
  23. 240
  24. 10
  25. 4
  26. 9
  27. 190
  28. 70
  29. 2
  30. 800
  31. 7
  32. through a distance
  33. 50
  34. 3
  35. 350
  36. 6
  37. 40
  38. 90
  39. 100
  40. 6

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