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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 752 · 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.🏋️ Pushing a crate 6 m took 2640 J of work. What force was used, in newtons?
  2. 2.🏋️ A 2 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ A force of 490 N did 3920 J of work. How many metres did the object move?
  4. 4.🏋️ Pushing a crate 4 m took 1120 J of work. What force was used, in newtons?
  5. 5.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes an 800 N box up it, in newtons? (ideal ramp, no friction)
  6. 6.🏋️ A machine lifts a load of 450 N when you push with 150 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ A force of 440 N pushes a cart 6 m along the floor. How much work is done, in joules?
  8. 8.🏋️ A machine lifts a load of 340 N when you push with 170 N. What is its mechanical advantage (MA)?
  9. 9.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  10. 10.🏋️ Mechanical advantage (MA) = … (a) effort ÷ load (b) load × effort (c) load + effort (d) load ÷ effort
  11. 11.🏋️ In which unit is work measured? (a) joule (J) (b) metre (m) (c) newton (N) (d) watt hour
  12. 12.🏋️ Pushing a crate 2 m took 980 J of work. What force was used, in newtons?
  13. 13.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 650 N when you push with 130 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ A machine lifts a load of 50 N when you push with 10 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 1200 N box up it, in newtons? (ideal ramp, no friction)
  17. 17.🏋️ Pushing a crate 8 m took 800 J of work. What force was used, in newtons?
  18. 18.🏋️ Can a simple machine reduce the work done? (a) only on Mondays (b) yes, always (c) no, work stays the same (d) yes, by half
  19. 19.🏋️ A smooth ramp is 18 m long and rises 3 m. What effort pushes a 600 N box up it, in newtons? (ideal ramp, no friction)
  20. 20.🏋️ A longer ramp to the same height needs … (a) more effort (b) no effort (c) less effort (d) the same effort
  21. 21.🏋️ A force of 440 N did 3520 J of work. How many metres did the object move?
  22. 22.🏋️ A force of 450 N did 900 J of work. How many metres did the object move?
  23. 23.🏋️ Pushing a crate 2 m took 240 J of work. What force was used, in newtons?
  24. 24.🏋️ A force of 430 N pushes a cart 4 m along the floor. How much work is done, in joules?
  25. 25.🏋️ A force of 80 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A machine lifts a load of 180 N when you push with 90 N. What is its mechanical advantage (MA)?
  27. 27.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  28. 28.🏋️ A smooth ramp is 15 m long and rises 3 m. What effort pushes a 4250 N box up it, in newtons? (ideal ramp, no friction)
  29. 29.🏋️ A force of 360 N did 720 J of work. How many metres did the object move?
  30. 30.🏋️ A machine lifts a load of 100 N when you push with 50 N. What is its mechanical advantage (MA)?
  31. 31.🏋️ A force of 150 N pushes a cart 10 m along the floor. How much work is done, in joules?
  32. 32.🏋️ A machine lifts a load of 300 N when you push with 150 N. What is its mechanical advantage (MA)?
  33. 33.🏋️ A force of 70 N pushes a cart 10 m along the floor. How much work is done, in joules?
  34. 34.🏋️ A smooth ramp is 6 m long and rises 1 m. What effort pushes a 6000 N box up it, in newtons? (ideal ramp, no friction)
  35. 35.🏋️ A force of 490 N pushes a cart 8 m along the floor. How much work is done, in joules?
  36. 36.🏋️ A machine lifts a load of 360 N when you push with 180 N. What is its mechanical advantage (MA)?
  37. 37.🏋️ A machine lifts a load of 960 N when you push with 160 N. What is its mechanical advantage (MA)?
  38. 38.🏋️ Pushing a crate 10 m took 3100 J of work. What force was used, in newtons?
  39. 39.🏋️ A force of 100 N pushes a cart 4 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A 13 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. 440
  2. 60
  3. 8
  4. 280
  5. 400
  6. 3
  7. 2640
  8. 2
  9. 2
  10. load ÷ effort
  11. joule (J)
  12. 490
  13. 9
  14. 5
  15. 5
  16. 200
  17. 100
  18. no, work stays the same
  19. 100
  20. less effort
  21. 8
  22. 2
  23. 120
  24. 1720
  25. 720
  26. 2
  27. 650
  28. 850
  29. 2
  30. 2
  31. 1500
  32. 2
  33. 700
  34. 1000
  35. 3920
  36. 2
  37. 6
  38. 310
  39. 400
  40. 130

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