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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 923 · 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 430 N pushes a cart 9 m along the floor. How much work is done, in joules?
  2. 2.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A machine lifts a load of 200 N when you push with 100 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 9 m took 630 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 40 N pushes a cart 3 m along the floor. How much work is done, in joules?
  8. 8.🏋️ Pushing a crate 6 m took 2820 J of work. What force was used, in newtons?
  9. 9.🏋️ A force of 240 N pushes a cart 4 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A 14 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  11. 11.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  12. 12.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  13. 13.🏋️ In which unit is work measured? (a) newton (N) (b) joule (J) (c) watt hour (d) metre (m)
  14. 14.🏋️ Pushing a crate 3 m took 1200 J of work. What force was used, in newtons?
  15. 15.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A force of 370 N did 2960 J of work. How many metres did the object move?
  17. 17.🏋️ A force of 110 N did 1100 J of work. How many metres did the object move?
  18. 18.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A force of 40 N did 160 J of work. How many metres did the object move?
  20. 20.🏋️ A force of 280 N pushes a cart 2 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A machine lifts a load of 40 N when you push with 10 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ An 18 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.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, always (d) yes, by half
  24. 24.🏋️ 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)
  25. 25.🏋️ Pushing a crate 2 m took 100 J of work. What force was used, in newtons?
  26. 26.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) without moving it (d) through a distance
  28. 28.🏋️ Pushing a crate 1 m took 350 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 100 N did 300 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 400 N when you push with 100 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  32. 32.🏋️ Pushing a crate 7 m took 2030 J of work. What force was used, in newtons?
  33. 33.🏋️ Pushing a crate 1 m took 150 J of work. What force was used, in newtons?
  34. 34.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ Pushing a crate 4 m took 920 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 3 m took 240 J of work. What force was used, in newtons?
  37. 37.🏋️ Pushing a crate 3 m took 990 J of work. What force was used, in newtons?
  38. 38.🏋️ A force of 220 N pushes a cart 2 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 3870
  2. 90
  3. 2
  4. 1880
  5. 70
  6. 2
  7. 120
  8. 470
  9. 960
  10. 420
  11. load ÷ effort
  12. 2640
  13. joule (J)
  14. 400
  15. 2
  16. 8
  17. 10
  18. 120
  19. 4
  20. 560
  21. 4
  22. 360
  23. no, work stays the same
  24. 250
  25. 50
  26. 130
  27. through a distance
  28. 350
  29. 3
  30. 4
  31. 120
  32. 290
  33. 150
  34. 150
  35. 230
  36. 80
  37. 330
  38. 440
  39. 3
  40. 450

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