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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 5 · 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 550 N when you push with 110 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  4. 4.🏋️ A machine lifts a load of 570 N when you push with 190 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ A force of 310 N pushes a cart 4 m along the floor. How much work is done, in joules?
  6. 6.🏋️ 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)
  7. 7.🏋️ A longer ramp to the same height needs … (a) the same effort (b) less effort (c) more effort (d) no effort
  8. 8.🏋️ A force of 360 N pushes a cart 3 m along the floor. How much work is done, in joules?
  9. 9.🏋️ Pushing a crate 1 m took 490 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 110 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Work is done when a force moves something … (a) without moving it (b) only upwards (c) very slowly (d) through a distance
  13. 13.🏋️ A force of 70 N pushes a cart 6 m along the floor. How much work is done, in joules?
  14. 14.🏋️ A force of 320 N did 3200 J of work. How many metres did the object move?
  15. 15.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) load + effort (d) effort ÷ load
  17. 17.🏋️ Pushing a crate 4 m took 1520 J of work. What force was used, in newtons?
  18. 18.🏋️ A machine lifts a load of 160 N when you push with 40 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, by half (c) no, work stays the same (d) yes, always
  20. 20.🏋️ A smooth ramp is 12 m long and rises 3 m. What effort pushes a 3000 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2550 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  23. 23.🏋️ A force of 150 N did 600 J of work. How many metres did the object move?
  24. 24.🏋️ A 4 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A 16 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  27. 27.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A force of 330 N did 2640 J of work. How many metres did the object move?
  29. 29.🏋️ A 10 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 50 N pushes a cart 4 m along the floor. How much work is done, in joules?
  31. 31.🏋️ In which unit is work measured? (a) newton (N) (b) watt hour (c) joule (J) (d) metre (m)
  32. 32.🏋️ An 18 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 720 N when you push with 120 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 250 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 350 N did 1400 J of work. How many metres did the object move?
  36. 36.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1900 N box up it, in newtons? (ideal ramp, no friction)
  37. 37.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1100 N box up it, in newtons? (ideal ramp, no friction)
  38. 38.🏋️ A force of 150 N did 1350 J of work. How many metres did the object move?
  39. 39.🏋️ A force of 440 N pushes a cart 4 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A machine lifts a load of 200 N when you push with 50 N. What is its mechanical advantage (MA)?

Answer key

  1. 5
  2. 5
  3. 700
  4. 3
  5. 1240
  6. 950
  7. less effort
  8. 1080
  9. 490
  10. 660
  11. 6
  12. through a distance
  13. 420
  14. 10
  15. 750
  16. load ÷ effort
  17. 380
  18. 4
  19. no, work stays the same
  20. 750
  21. 850
  22. 300
  23. 4
  24. 160
  25. 50
  26. 640
  27. 800
  28. 8
  29. 200
  30. 200
  31. joule (J)
  32. 360
  33. 6
  34. 50
  35. 4
  36. 950
  37. 550
  38. 9
  39. 1760
  40. 4

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