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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 143 · 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 force of 270 N did 1080 J of work. How many metres did the object move?
  2. 2.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) effort ÷ load (c) load × effort (d) load + effort
  3. 3.🏋️ A 5 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  4. 4.🏋️ A force of 90 N pushes a cart 7 m along the floor. How much work is done, in joules?
  5. 5.🏋️ A force of 290 N did 2320 J of work. How many metres did the object move?
  6. 6.🏋️ Pushing a crate 7 m took 1050 J of work. What force was used, in newtons?
  7. 7.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) no effort (d) less effort
  8. 8.🏋️ A force of 490 N did 2450 J of work. How many metres did the object move?
  9. 9.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  10. 10.🏋️ In which unit is work measured? (a) metre (m) (b) watt hour (c) newton (N) (d) joule (J)
  11. 11.🏋️ A force of 420 N pushes a cart 4 m along the floor. How much work is done, in joules?
  12. 12.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A 7 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  15. 15.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  16. 16.🏋️ A force of 200 N pushes a cart 3 m along the floor. How much work is done, in joules?
  17. 17.🏋️ A force of 350 N did 1750 J of work. How many metres did the object move?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) no, work stays the same (c) only on Mondays (d) yes, by half
  19. 19.🏋️ A machine lifts a load of 510 N when you push with 170 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ Pushing a crate 9 m took 2340 J of work. What force was used, in newtons?
  21. 21.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) very slowly (d) without moving it
  22. 22.🏋️ A force of 470 N did 4230 J of work. How many metres did the object move?
  23. 23.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1500 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ A force of 110 N pushes a cart 2 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 400 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  29. 29.🏋️ A smooth ramp is 4 m long and rises 2 m. What effort pushes a 1000 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ 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?
  31. 31.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3400 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ Pushing a crate 6 m took 2880 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 9 m took 1170 J of work. What force was used, in newtons?
  35. 35.🏋️ A machine lifts a load of 60 N when you push with 10 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A force of 240 N did 1920 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 400 N pushes a cart 4 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 280 N did 1680 J of work. How many metres did the object move?
  39. 39.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A force of 370 N pushes a cart 8 m along the floor. How much work is done, in joules?

Answer key

  1. 4
  2. load ÷ effort
  3. 50
  4. 630
  5. 8
  6. 150
  7. less effort
  8. 5
  9. 6
  10. joule (J)
  11. 1680
  12. 4
  13. 2
  14. 280
  15. 500
  16. 600
  17. 5
  18. no, work stays the same
  19. 3
  20. 260
  21. through a distance
  22. 9
  23. 500
  24. 220
  25. 1000
  26. 3
  27. 200
  28. 3
  29. 500
  30. 160
  31. 600
  32. 850
  33. 480
  34. 130
  35. 6
  36. 8
  37. 1600
  38. 6
  39. 2
  40. 2960

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