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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 473 · 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 force of 130 N pushes a cart 10 m along the floor. How much work is done, in joules?
  2. 2.🏋️ Pushing a crate 1 m took 470 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 120 N pushes a cart 5 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 480 N did 4320 J of work. How many metres did the object move?
  9. 9.🏋️ 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?
  10. 10.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ 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?
  13. 13.🏋️ 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)
  14. 14.🏋️ 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?
  15. 15.🏋️ A force of 230 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A force of 120 N pushes a cart 4 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A 19 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.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 270 N pushes a cart 3 m along the floor. How much work is done, in joules?
  20. 20.🏋️ Pushing a crate 2 m took 600 J of work. What force was used, in newtons?
  21. 21.🏋️ 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?
  22. 22.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  24. 24.🏋️ Pushing a crate 4 m took 80 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 380 N did 760 J of work. How many metres did the object move?
  26. 26.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) through a distance (d) without moving it
  27. 27.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  28. 28.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A machine lifts a load of 180 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load ÷ effort (d) load × effort
  31. 31.🏋️ A 20 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 220 N when you push with 110 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  34. 34.🏋️ Pushing a crate 1 m took 500 J of work. What force was used, in newtons?
  35. 35.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  36. 36.🏋️ A machine lifts a load of 160 N when you push with 80 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ An 18 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 80 N did 160 J of work. How many metres did the object move?

Answer key

  1. 1300
  2. 470
  3. 5
  4. 700
  5. 2280
  6. 600
  7. 2
  8. 9
  9. 80
  10. 40
  11. 2960
  12. 800
  13. 250
  14. 70
  15. 460
  16. 480
  17. 380
  18. 240
  19. 810
  20. 300
  21. 300
  22. 600
  23. less effort
  24. 20
  25. 2
  26. through a distance
  27. no, work stays the same
  28. 2
  29. 3
  30. load ÷ effort
  31. 1000
  32. 2
  33. joule (J)
  34. 500
  35. 410
  36. 2
  37. 180
  38. 30
  39. 50
  40. 2

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