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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 33 · 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) more effort (b) the same effort (c) less effort (d) no effort
  2. 2.🏋️ A force of 310 N pushes a cart 7 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 350 N did 1050 J of work. How many metres did the object move?
  4. 4.🏋️ A 3 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A machine lifts a load of 540 N when you push with 90 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A machine lifts a load of 660 N when you push with 110 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ Pushing a crate 5 m took 600 J of work. What force was used, in newtons?
  10. 10.🏋️ Work is done when a force moves something … (a) very slowly (b) through a distance (c) only upwards (d) without moving it
  11. 11.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  12. 12.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ Pushing a crate 4 m took 1960 J of work. What force was used, in newtons?
  14. 14.🏋️ A 1 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  16. 16.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  17. 17.🏋️ Pushing a crate 1 m took 280 J of work. What force was used, in newtons?
  18. 18.🏋️ Pushing a crate 4 m took 1480 J of work. What force was used, in newtons?
  19. 19.🏋️ A force of 490 N did 980 J of work. How many metres did the object move?
  20. 20.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2500 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 470 N did 940 J of work. How many metres did the object move?
  24. 24.🏋️ A 6 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 5400 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 80 N did 320 J of work. How many metres did the object move?
  27. 27.🏋️ A force of 240 N pushes a cart 10 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 80 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ Pushing a crate 3 m took 1380 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 220 N did 1540 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 2 m took 740 J of work. What force was used, in newtons?
  34. 34.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  35. 35.🏋️ Pushing a crate 3 m took 870 J of work. What force was used, in newtons?
  36. 36.🏋️ Pushing a crate 6 m took 2040 J of work. What force was used, in newtons?
  37. 37.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 70 N did 630 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 260 N did 1040 J of work. How many metres did the object move?
  40. 40.🏋️ A force of 370 N did 2590 J of work. How many metres did the object move?

Answer key

  1. less effort
  2. 2170
  3. 3
  4. 30
  5. 700
  6. 4
  7. 6
  8. 6
  9. 120
  10. through a distance
  11. no, work stays the same
  12. 950
  13. 490
  14. 30
  15. 8
  16. 2
  17. 280
  18. 370
  19. 2
  20. 3
  21. 500
  22. 200
  23. 2
  24. 60
  25. 900
  26. 4
  27. 2400
  28. 80
  29. 460
  30. 500
  31. 50
  32. 7
  33. 370
  34. load ÷ effort
  35. 290
  36. 340
  37. 700
  38. 9
  39. 4
  40. 7

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