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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 713 · 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 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 5700 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) newton (N) (d) joule (J)
  4. 4.🏋️ A 7 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  5. 5.🏋️ Pushing a crate 7 m took 560 J of work. What force was used, in newtons?
  6. 6.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 450 N box up it, in newtons? (ideal ramp, no friction)
  7. 7.🏋️ A force of 350 N did 350 J of work. How many metres did the object move?
  8. 8.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 300 N box up it, in newtons? (ideal ramp, no friction)
  9. 9.🏋️ Pushing a crate 2 m took 700 J of work. What force was used, in newtons?
  10. 10.🏋️ A force of 330 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 60 N did 600 J of work. How many metres did the object move?
  12. 12.🏋️ A force of 60 N did 120 J of work. How many metres did the object move?
  13. 13.🏋️ Pushing a crate 9 m took 1890 J of work. What force was used, in newtons?
  14. 14.🏋️ A force of 450 N did 900 J of work. How many metres did the object move?
  15. 15.🏋️ Work is done when a force moves something … (a) through a distance (b) without moving it (c) very slowly (d) only upwards
  16. 16.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) no, work stays the same (c) yes, by half (d) yes, always
  17. 17.🏋️ A force of 410 N pushes a cart 2 m along the floor. How much work is done, in joules?
  18. 18.🏋️ An 8 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ 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?
  20. 20.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 4500 N box up it, in newtons? (ideal ramp, no friction)
  21. 21.🏋️ A force of 370 N did 370 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 130 N pushes a cart 1 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A force of 230 N did 920 J of work. How many metres did the object move?
  24. 24.🏋️ Mechanical advantage (MA) = … (a) load + effort (b) effort ÷ load (c) load × effort (d) load ÷ effort
  25. 25.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 240 N pushes a cart 10 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A machine lifts a load of 320 N when you push with 80 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ A smooth ramp is 6 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  30. 30.🏋️ A 4 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 4 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A force of 390 N did 390 J of work. How many metres did the object move?
  33. 33.🏋️ Pushing a crate 6 m took 1740 J of work. What force was used, in newtons?
  34. 34.🏋️ Pushing a crate 2 m took 840 J of work. What force was used, in newtons?
  35. 35.🏋️ A force of 380 N did 1520 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 20 N did 40 J of work. How many metres did the object move?
  37. 37.🏋️ A force of 240 N pushes a cart 1 m along the floor. How much work is done, in joules?
  38. 38.🏋️ Pushing a crate 10 m took 4400 J of work. What force was used, in newtons?
  39. 39.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  40. 40.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2400 N box up it, in newtons? (ideal ramp, no friction)

Answer key

  1. 2
  2. 950
  3. joule (J)
  4. 210
  5. 80
  6. 150
  7. 1
  8. 100
  9. 350
  10. 1980
  11. 10
  12. 2
  13. 210
  14. 2
  15. through a distance
  16. no, work stays the same
  17. 820
  18. 400
  19. 320
  20. 750
  21. 1
  22. 130
  23. 4
  24. load ÷ effort
  25. 300
  26. 2400
  27. 4
  28. 600
  29. 5
  30. 80
  31. 1000
  32. 1
  33. 290
  34. 420
  35. 4
  36. 2
  37. 240
  38. 440
  39. 6
  40. 400

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