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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 160 · 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 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  2. 2.🏋️ Pushing a crate 2 m took 920 J of work. What force was used, in newtons?
  3. 3.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  5. 5.🏋️ A force of 450 N did 1350 J of work. How many metres did the object move?
  6. 6.🏋️ 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?
  7. 7.🏋️ 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?
  8. 8.🏋️ A force of 140 N pushes a cart 5 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  10. 10.🏋️ A force of 500 N pushes a cart 4 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 260 N when you push with 130 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 10 m took 500 J of work. What force was used, in newtons?
  13. 13.🏋️ A machine lifts a load of 950 N when you push with 190 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ Pushing a crate 3 m took 690 J of work. What force was used, in newtons?
  15. 15.🏋️ A force of 310 N pushes a cart 2 m along the floor. How much work is done, in joules?
  16. 16.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) less effort (d) the same effort
  17. 17.🏋️ A 10 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ A force of 220 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A force of 390 N pushes a cart 6 m along the floor. How much work is done, in joules?
  20. 20.🏋️ A force of 270 N did 540 J of work. How many metres did the object move?
  21. 21.🏋️ A force of 140 N did 840 J of work. How many metres did the object move?
  22. 22.🏋️ Work is done when a force moves something … (a) very slowly (b) only upwards (c) through a distance (d) without moving it
  23. 23.🏋️ 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
  24. 24.🏋️ A 4 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 force of 20 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A force of 60 N pushes a cart 6 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A 4 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  28. 28.🏋️ A force of 290 N did 580 J of work. How many metres did the object move?
  29. 29.🏋️ A force of 170 N pushes a cart 3 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 220 N pushes a cart 5 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 340 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1300 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  37. 37.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  38. 38.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  39. 39.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  40. 40.🏋️ A machine lifts a load of 360 N when you push with 90 N. What is its mechanical advantage (MA)?

Answer key

  1. 20
  2. 460
  3. 3
  4. 900
  5. 3
  6. 30
  7. 110
  8. 700
  9. 200
  10. 2000
  11. 2
  12. 50
  13. 5
  14. 230
  15. 620
  16. less effort
  17. 100
  18. 1760
  19. 2340
  20. 2
  21. 6
  22. through a distance
  23. no, work stays the same
  24. 40
  25. 180
  26. 360
  27. 120
  28. 2
  29. 510
  30. 700
  31. 3
  32. 800
  33. 1100
  34. 1360
  35. 650
  36. 720
  37. load ÷ effort
  38. 6
  39. 250
  40. 4

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