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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 149 · 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 longer ramp to the same height needs … (a) no effort (b) less effort (c) more effort (d) the same effort
  2. 2.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 250 N pushes a cart 3 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 270 N when you push with 90 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  8. 8.🏋️ A force of 140 N did 420 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 8 m took 640 J of work. What force was used, in newtons?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  11. 11.🏋️ A 16 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  12. 12.🏋️ A 3 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  14. 14.🏋️ Pushing a crate 7 m took 420 J of work. What force was used, in newtons?
  15. 15.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 100 N did 500 J of work. How many metres did the object move?
  17. 17.🏋️ A machine lifts a load of 850 N when you push with 170 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A force of 120 N pushes a cart 3 m along the floor. How much work is done, in joules?
  19. 19.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  20. 20.🏋️ A smooth ramp is 10 m long and rises 2 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 110 N did 330 J of work. How many metres did the object move?
  24. 24.🏋️ A force of 140 N did 280 J of work. How many metres did the object move?
  25. 25.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1650 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 300 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 3 m long and rises 1 m. What effort pushes a 2850 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A force of 70 N pushes a cart 8 m along the floor. How much work is done, in joules?
  31. 31.🏋️ A force of 450 N pushes a cart 2 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A force of 250 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  34. 34.🏋️ Pushing a crate 5 m took 1250 J of work. What force was used, in newtons?
  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 16 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 330 N did 1320 J of work. How many metres did the object move?
  39. 39.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) only on Mondays (c) yes, always (d) yes, by half
  40. 40.🏋️ A force of 280 N pushes a cart 5 m along the floor. How much work is done, in joules?

Answer key

  1. less effort
  2. 200
  3. 5
  4. 750
  5. 3
  6. 6
  7. 400
  8. 3
  9. 80
  10. load ÷ effort
  11. 480
  12. 120
  13. through a distance
  14. 60
  15. 150
  16. 5
  17. 5
  18. 360
  19. 150
  20. 850
  21. 200
  22. 400
  23. 3
  24. 2
  25. 550
  26. 900
  27. 950
  28. 4
  29. 450
  30. 560
  31. 900
  32. 1500
  33. 1020
  34. 250
  35. 900
  36. 320
  37. 250
  38. 4
  39. no, work stays the same
  40. 1400

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