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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 419 · 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 390 N did 3900 J of work. How many metres did the object move?
  2. 2.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) yes, by half (d) no, work stays the same
  3. 3.🏋️ A force of 430 N pushes a cart 1 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  5. 5.🏋️ An 8 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ Pushing a crate 9 m took 1260 J of work. What force was used, in newtons?
  7. 7.🏋️ A 17 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  8. 8.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  9. 9.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load ÷ effort (d) load + effort
  10. 10.🏋️ A force of 270 N did 2430 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 100 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ Pushing a crate 10 m took 2100 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 600 N when you push with 200 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3200 N box up it, in newtons? (ideal ramp, no friction)
  15. 15.🏋️ Work is done when a force moves something … (a) only upwards (b) without moving it (c) through a distance (d) very slowly
  16. 16.🏋️ A 15 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  17. 17.🏋️ A force of 220 N did 440 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 450 N pushes a cart 4 m along the floor. How much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ A force of 50 N pushes a cart 8 m along the floor. How much work is done, in joules?
  21. 21.🏋️ A force of 390 N pushes a cart 3 m along the floor. How much work is done, in joules?
  22. 22.🏋️ A force of 50 N did 50 J of work. How many metres did the object move?
  23. 23.🏋️ A force of 40 N pushes a cart 2 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 110 N pushes a cart 10 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A machine lifts a load of 840 N when you push with 140 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A 1 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 force of 480 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 2 m took 540 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 460 N did 3220 J of work. How many metres did the object move?
  32. 32.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ Pushing a crate 6 m took 840 J of work. What force was used, in newtons?
  34. 34.🏋️ A force of 430 N did 2150 J of work. How many metres did the object move?
  35. 35.🏋️ 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)
  36. 36.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A machine lifts a load of 280 N when you push with 140 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ 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?
  39. 39.🏋️ A force of 220 N pushes a cart 1 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4200 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 10
  2. no, work stays the same
  3. 430
  4. 340
  5. 80
  6. 140
  7. 170
  8. less effort
  9. load ÷ effort
  10. 9
  11. 700
  12. 210
  13. 3
  14. 800
  15. through a distance
  16. 600
  17. 2
  18. 1800
  19. 130
  20. 400
  21. 1170
  22. 1
  23. 80
  24. 1100
  25. 6
  26. 550
  27. 950
  28. 10
  29. 3360
  30. 270
  31. 7
  32. 2
  33. 140
  34. 5
  35. 900
  36. 1980
  37. 2
  38. 80
  39. 220
  40. 700

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