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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 535 · 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.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load ÷ effort (c) effort ÷ load (d) load + effort
  2. 2.🏋️ A force of 490 N pushes a cart 5 m along the floor. How much work is done, in joules?
  3. 3.🏋️ A force of 360 N did 3600 J of work. How many metres did the object move?
  4. 4.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  6. 6.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ Work is done when a force moves something … (a) only upwards (b) very slowly (c) without moving it (d) through a distance
  8. 8.🏋️ 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
  9. 9.🏋️ Pushing a crate 6 m took 720 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  14. 14.🏋️ Pushing a crate 5 m took 350 J of work. What force was used, in newtons?
  15. 15.🏋️ A longer ramp to the same height needs … (a) less effort (b) the same effort (c) more effort (d) no effort
  16. 16.🏋️ Pushing a crate 4 m took 960 J of work. What force was used, in newtons?
  17. 17.🏋️ A force of 370 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 4800 N box up it, in newtons? (ideal ramp, no friction)
  19. 19.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  20. 20.🏋️ Pushing a crate 10 m took 3500 J of work. What force was used, in newtons?
  21. 21.🏋️ Pushing a crate 9 m took 3240 J of work. What force was used, in newtons?
  22. 22.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ A force of 320 N pushes a cart 3 m along the floor. How much work is done, in joules?
  24. 24.🏋️ A force of 500 N pushes a cart 3 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
  26. 26.🏋️ In which unit is work measured? (a) metre (m) (b) newton (N) (c) watt hour (d) joule (J)
  27. 27.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 500 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ 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?
  29. 29.🏋️ A machine lifts a load of 300 N when you push with 100 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ An 11 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  31. 31.🏋️ A force of 200 N pushes a cart 7 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 90 N pushes a cart 8 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A force of 340 N did 2380 J of work. How many metres did the object move?
  35. 35.🏋️ A force of 300 N did 300 J of work. How many metres did the object move?
  36. 36.🏋️ A machine lifts a load of 520 N when you push with 130 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A 10 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A force of 120 N did 120 J of work. How many metres did the object move?
  40. 40.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?

Answer key

  1. load ÷ effort
  2. 2450
  3. 10
  4. 640
  5. 4
  6. 800
  7. through a distance
  8. no, work stays the same
  9. 120
  10. 8
  11. 4
  12. 5
  13. 9
  14. 70
  15. less effort
  16. 240
  17. 740
  18. 800
  19. 250
  20. 350
  21. 360
  22. 3
  23. 960
  24. 1500
  25. 500
  26. joule (J)
  27. 100
  28. 30
  29. 3
  30. 220
  31. 1400
  32. 450
  33. 720
  34. 7
  35. 1
  36. 4
  37. 40
  38. 300
  39. 1
  40. 6

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