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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 398 · 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 longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  2. 2.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, by half (c) yes, always (d) only on Mondays
  3. 3.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 2 m took 320 J of work. What force was used, in newtons?
  5. 5.🏋️ A machine lifts a load of 30 N when you push with 10 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 150 N did 600 J of work. How many metres did the object move?
  8. 8.🏋️ Pushing a crate 4 m took 680 J of work. What force was used, in newtons?
  9. 9.🏋️ 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?
  10. 10.🏋️ A force of 40 N did 400 J of work. How many metres did the object move?
  11. 11.🏋️ A force of 490 N pushes a cart 7 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A force of 280 N did 1680 J of work. How many metres did the object move?
  13. 13.🏋️ A 15 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  14. 14.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ Work is done when a force moves something … (a) without moving it (b) through a distance (c) only upwards (d) very slowly
  16. 16.🏋️ A machine lifts a load of 330 N when you push with 110 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 10 N pushes a cart 7 m along the floor. How much work is done, in joules?
  18. 18.🏋️ Pushing a crate 7 m took 3150 J of work. What force was used, in newtons?
  19. 19.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 390 N did 1950 J of work. How many metres did the object move?
  22. 22.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load ÷ effort (c) load × effort (d) load + effort
  24. 24.🏋️ Pushing a crate 6 m took 420 J of work. What force was used, in newtons?
  25. 25.🏋️ A machine lifts a load of 240 N when you push with 40 N. What is its mechanical advantage (MA)?
  26. 26.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 390 N pushes a cart 2 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 190 N pushes a cart 10 m along the floor. How much work is done, in joules?
  30. 30.🏋️ Pushing a crate 6 m took 2460 J of work. What force was used, in newtons?
  31. 31.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 230 N pushes a cart 7 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 250 N pushes a cart 1 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  35. 35.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  37. 37.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  38. 38.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  39. 39.🏋️ A 6 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A force of 350 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. no, work stays the same
  3. 5
  4. 160
  5. 3
  6. 450
  7. 4
  8. 170
  9. 90
  10. 10
  11. 3430
  12. 6
  13. 300
  14. 2
  15. through a distance
  16. 3
  17. 70
  18. 450
  19. 850
  20. 400
  21. 5
  22. 600
  23. load ÷ effort
  24. 70
  25. 6
  26. 570
  27. 700
  28. 780
  29. 1900
  30. 410
  31. 200
  32. 1610
  33. 250
  34. 4
  35. 9
  36. 720
  37. 4
  38. 120
  39. 240
  40. 2800

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