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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 726 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏋️ A force of 150 N did 1200 J of work. How many metres did the object move?
  2. 2.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 2250 N box up it, in newtons? (ideal ramp, no friction)
  3. 3.🏋️ A machine lifts a load of 250 N when you push with 50 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ Pushing a crate 9 m took 3060 J of work. What force was used, in newtons?
  5. 5.🏋️ A force of 330 N pushes a cart 8 m along the floor. How much work is done, in joules?
  6. 6.🏋️ A force of 60 N pushes a cart 10 m along the floor. How much work is done, in joules?
  7. 7.🏋️ Pushing a crate 3 m took 1320 J of work. What force was used, in newtons?
  8. 8.🏋️ A 9 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  9. 9.🏋️ Pushing a crate 3 m took 750 J of work. What force was used, in newtons?
  10. 10.🏋️ A smooth ramp is 9 m long and rises 3 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  11. 11.🏋️ A machine lifts a load of 80 N when you push with 40 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 7 m took 700 J of work. What force was used, in newtons?
  13. 13.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load + effort (c) load × effort (d) load ÷ effort
  14. 14.🏋️ In which unit is work measured? (a) newton (N) (b) metre (m) (c) joule (J) (d) watt hour
  15. 15.🏋️ A machine lifts a load of 40 N when you push with 20 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Can a simple machine reduce the work done? (a) no, work stays the same (b) yes, always (c) only on Mondays (d) yes, by half
  17. 17.🏋️ A force of 260 N did 780 J of work. How many metres did the object move?
  18. 18.🏋️ A force of 140 N pushes a cart 8 m along the floor. How much work is done, in joules?
  19. 19.🏋️ A machine lifts a load of 780 N when you push with 130 N. What is its mechanical advantage (MA)?
  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 machine lifts a load of 420 N when you push with 140 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  23. 23.🏋️ A longer ramp to the same height needs … (a) no effort (b) the same effort (c) less effort (d) more effort
  24. 24.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 2000 N box up it, in newtons? (ideal ramp, no friction)
  25. 25.🏋️ Pushing a crate 10 m took 1200 J of work. What force was used, in newtons?
  26. 26.🏋️ A force of 380 N pushes a cart 6 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 380 N pushes a cart 1 m along the floor. How much work is done, in joules?
  28. 28.🏋️ Pushing a crate 3 m took 960 J of work. What force was used, in newtons?
  29. 29.🏋️ Pushing a crate 3 m took 630 J of work. What force was used, in newtons?
  30. 30.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1400 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  32. 32.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  33. 33.🏋️ A force of 420 N did 420 J of work. How many metres did the object move?
  34. 34.🏋️ A force of 90 N pushes a cart 9 m along the floor. How much work is done, in joules?
  35. 35.🏋️ Pushing a crate 5 m took 800 J of work. What force was used, in newtons?
  36. 36.🏋️ A 2 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  37. 37.🏋️ A force of 460 N did 2760 J of work. How many metres did the object move?
  38. 38.🏋️ A force of 150 N pushes a cart 1 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A force of 380 N did 2660 J of work. How many metres did the object move?
  40. 40.🏋️ 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)

Answer key

  1. 8
  2. 750
  3. 5
  4. 340
  5. 2640
  6. 600
  7. 440
  8. 180
  9. 250
  10. 600
  11. 2
  12. 100
  13. load ÷ effort
  14. joule (J)
  15. 2
  16. no, work stays the same
  17. 3
  18. 1120
  19. 6
  20. 100
  21. 3
  22. 720
  23. less effort
  24. 500
  25. 120
  26. 2280
  27. 380
  28. 320
  29. 210
  30. 350
  31. 350
  32. 350
  33. 1
  34. 810
  35. 160
  36. 80
  37. 6
  38. 150
  39. 7
  40. 550

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