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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 852 · 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 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)
  3. 3.🏋️ A force of 180 N pushes a cart 4 m along the floor. How much work is done, in joules?
  4. 4.🏋️ Pushing a crate 6 m took 600 J of work. What force was used, in newtons?
  5. 5.🏋️ A 15 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  6. 6.🏋️ A force of 250 N did 1500 J of work. How many metres did the object move?
  7. 7.🏋️ Pushing a crate 10 m took 3600 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 170 N did 680 J of work. How many metres did the object move?
  9. 9.🏋️ Pushing a crate 4 m took 1200 J of work. What force was used, in newtons?
  10. 10.🏋️ A machine lifts a load of 120 N when you push with 60 N. What is its mechanical advantage (MA)?
  11. 11.🏋️ A force of 370 N did 2220 J of work. How many metres did the object move?
  12. 12.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 2750 N box up it, in newtons? (ideal ramp, no friction)
  13. 13.🏋️ A machine lifts a load of 120 N when you push with 30 N. What is its mechanical advantage (MA)?
  14. 14.🏋️ A force of 230 N did 2070 J of work. How many metres did the object move?
  15. 15.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  16. 16.🏋️ A machine lifts a load of 1140 N when you push with 190 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A force of 120 N pushes a cart 9 m along the floor. How much work is done, in joules?
  18. 18.🏋️ A machine lifts a load of 390 N when you push with 130 N. What is its mechanical advantage (MA)?
  19. 19.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  20. 20.🏋️ A 5 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  21. 21.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  22. 22.🏋️ A machine lifts a load of 210 N when you push with 70 N. What is its mechanical advantage (MA)?
  23. 23.🏋️ In which unit is work measured? (a) watt hour (b) joule (J) (c) metre (m) (d) newton (N)
  24. 24.🏋️ Pushing a crate 7 m took 1330 J of work. What force was used, in newtons?
  25. 25.🏋️ A force of 240 N did 1440 J of work. How many metres did the object move?
  26. 26.🏋️ A smooth ramp is 5 m long and rises 1 m. What effort pushes a 3500 N box up it, in newtons? (ideal ramp, no friction)
  27. 27.🏋️ A machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  28. 28.🏋️ Pushing a crate 5 m took 850 J of work. What force was used, in newtons?
  29. 29.🏋️ A force of 260 N pushes a cart 7 m along the floor. How much work is done, in joules?
  30. 30.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 750 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 90 N did 720 J of work. How many metres did the object move?
  32. 32.🏋️ Pushing a crate 3 m took 510 J of work. What force was used, in newtons?
  33. 33.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 3600 N box up it, in newtons? (ideal ramp, no friction)
  34. 34.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
  35. 35.🏋️ A machine lifts a load of 300 N when you push with 50 N. What is its mechanical advantage (MA)?
  36. 36.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A force of 30 N pushes a cart 8 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A 1 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  39. 39.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ A 4 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?

Answer key

  1. load ÷ effort
  2. 500
  3. 720
  4. 100
  5. 750
  6. 6
  7. 360
  8. 4
  9. 300
  10. 2
  11. 6
  12. 550
  13. 4
  14. 9
  15. no, work stays the same
  16. 6
  17. 1080
  18. 3
  19. less effort
  20. 100
  21. 1000
  22. 3
  23. joule (J)
  24. 190
  25. 6
  26. 700
  27. 3
  28. 170
  29. 1820
  30. 150
  31. 8
  32. 170
  33. 900
  34. 8
  35. 6
  36. 6
  37. 240
  38. 20
  39. 120
  40. 40

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