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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 907 · 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.

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  1. 1.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ 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
  3. 3.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  4. 4.🏋️ A force of 410 N pushes a cart 6 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3750 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 50 N did 100 J of work. How many metres did the object move?
  8. 8.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 1 m took 260 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 450 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 150 N pushes a cart 8 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 350 N did 2800 J of work. How many metres did the object move?
  14. 14.🏋️ A force of 460 N pushes a cart 9 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A force of 180 N did 720 J of work. How many metres did the object move?
  16. 16.🏋️ Pushing a crate 1 m took 100 J of work. What force was used, in newtons?
  17. 17.🏋️ 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?
  18. 18.🏋️ A machine lifts a load of 800 N when you push with 200 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4750 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A force of 450 N did 3600 J of work. How many metres did the object move?
  23. 23.🏋️ A longer ramp to the same height needs … (a) no effort (b) less effort (c) the same effort (d) more effort
  24. 24.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 10 N did 100 J of work. How many metres did the object move?
  26. 26.🏋️ A machine lifts a load of 800 N when you push with 160 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 9 m took 4500 J of work. What force was used, in newtons?
  29. 29.🏋️ An 8 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  30. 30.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  32. 32.🏋️ A force of 390 N did 2730 J of work. How many metres did the object move?
  33. 33.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2700 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A 13 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  35. 35.🏋️ A force of 500 N did 4500 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 220 N did 1100 J of work. How many metres did the object move?
  37. 37.🏋️ 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?
  38. 38.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 370 N did 1110 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?

Answer key

  1. 3
  2. no, work stays the same
  3. through a distance
  4. 2460
  5. 200
  6. 750
  7. 2
  8. 1240
  9. 260
  10. 2700
  11. 1200
  12. 150
  13. 8
  14. 4140
  15. 4
  16. 100
  17. 110
  18. 4
  19. load ÷ effort
  20. 950
  21. 350
  22. 8
  23. less effort
  24. 60
  25. 10
  26. 5
  27. 2450
  28. 500
  29. 160
  30. 700
  31. 2
  32. 7
  33. 450
  34. 260
  35. 9
  36. 5
  37. 120
  38. 2
  39. 3
  40. 3

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