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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 770 · 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 210 N did 840 J of work. How many metres did the object move?
  2. 2.🏋️ A force of 400 N did 2400 J of work. How many metres did the object move?
  3. 3.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ 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?
  5. 5.🏋️ A machine lifts a load of 1000 N when you push with 200 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) load + effort (d) effort ÷ load
  7. 7.🏋️ Pushing a crate 8 m took 2560 J of work. What force was used, in newtons?
  8. 8.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ 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?
  10. 10.🏋️ A force of 10 N pushes a cart 10 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  12. 12.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  13. 13.🏋️ A force of 280 N pushes a cart 10 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 490 N did 1960 J of work. How many metres did the object move?
  15. 15.🏋️ A force of 470 N pushes a cart 4 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ Can a simple machine reduce the work done? (a) yes, by half (b) yes, always (c) no, work stays the same (d) only on Mondays
  18. 18.🏋️ A force of 240 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 130 N did 650 J of work. How many metres did the object move?
  20. 20.🏋️ Pushing a crate 7 m took 910 J of work. What force was used, in newtons?
  21. 21.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) newton (N) (d) metre (m)
  22. 22.🏋️ A force of 40 N pushes a cart 7 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 160 N pushes a cart 3 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 640 N when you push with 160 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A machine lifts a load of 20 N when you push with 10 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 180 N pushes a cart 8 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 1 m took 20 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  32. 32.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  33. 33.🏋️ An 8 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  34. 34.🏋️ Pushing a crate 3 m took 1260 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 300 N did 2100 J of work. How many metres did the object move?
  36. 36.🏋️ A 19 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.🏋️ Pushing a crate 6 m took 960 J of work. What force was used, in newtons?
  38. 38.🏋️ Pushing a crate 7 m took 1610 J of work. What force was used, in newtons?
  39. 39.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 490 N pushes a cart 3 m along the floor. How much work is done, in joules?

Answer key

  1. 4
  2. 6
  3. 400
  4. 700
  5. 5
  6. load ÷ effort
  7. 320
  8. 300
  9. 40
  10. 100
  11. 950
  12. through a distance
  13. 2800
  14. 4
  15. 1880
  16. 4
  17. no, work stays the same
  18. 1920
  19. 5
  20. 130
  21. joule (J)
  22. 280
  23. 700
  24. 240
  25. 480
  26. 4
  27. 2
  28. 350
  29. 1440
  30. 20
  31. 1170
  32. 260
  33. 320
  34. 420
  35. 7
  36. 950
  37. 160
  38. 230
  39. 500
  40. 1470

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