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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 950 · 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.🏋️ Pushing a crate 7 m took 2100 J of work. What force was used, in newtons?
  2. 2.🏋️ Pushing a crate 9 m took 1530 J of work. What force was used, in newtons?
  3. 3.🏋️ An 11 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 280 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 480 N pushes a cart 5 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 440 N pushes a cart 7 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A force of 120 N did 960 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 380 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 2 m took 180 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  12. 12.🏋️ A force of 420 N pushes a cart 6 m along the floor. How much work is done, in joules?
  13. 13.🏋️ 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
  14. 14.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A 20 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ 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?
  18. 18.🏋️ A force of 210 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 330 N did 2970 J of work. How many metres did the object move?
  20. 20.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) watt hour (d) joule (J)
  21. 21.🏋️ A force of 330 N pushes a cart 4 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 410 N did 2870 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 5 m took 1400 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 50 N pushes a cart 1 m along the floor. How much work is done, in joules?
  25. 25.🏋️ Pushing a crate 3 m took 720 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 390 N did 3900 J of work. How many metres did the object move?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load + effort (c) load × effort (d) effort ÷ load
  29. 29.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 440 N pushes a cart 2 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 140 N when you push with 70 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A machine lifts a load of 750 N when you push with 150 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A machine lifts a load of 100 N when you push with 20 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 320 N pushes a cart 7 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A 4 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  36. 36.🏋️ A force of 230 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  40. 40.🏋️ A force of 270 N did 810 J of work. How many metres did the object move?

Answer key

  1. 300
  2. 170
  3. 110
  4. 840
  5. 2400
  6. 3080
  7. 8
  8. 1900
  9. 90
  10. 150
  11. through a distance
  12. 2520
  13. no, work stays the same
  14. 7
  15. 1000
  16. 600
  17. 1000
  18. 1680
  19. 9
  20. joule (J)
  21. 1320
  22. 7
  23. 280
  24. 50
  25. 240
  26. 10
  27. 100
  28. load ÷ effort
  29. 900
  30. 880
  31. 2
  32. 5
  33. 5
  34. 2240
  35. 200
  36. 920
  37. 450
  38. 1290
  39. 250
  40. 3

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