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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 173 · 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.🏋️ In which unit is work measured? (a) watt hour (b) metre (m) (c) joule (J) (d) newton (N)
  2. 2.🏋️ A machine lifts a load of 400 N when you push with 80 N. What is its mechanical advantage (MA)?
  3. 3.🏋️ A machine lifts a load of 900 N when you push with 150 N. What is its mechanical advantage (MA)?
  4. 4.🏋️ A force of 380 N pushes a cart 2 m along the floor. How much work is done, in joules?
  5. 5.🏋️ Pushing a crate 2 m took 260 J of work. What force was used, in newtons?
  6. 6.🏋️ A machine lifts a load of 150 N when you push with 50 N. What is its mechanical advantage (MA)?
  7. 7.🏋️ Pushing a crate 10 m took 1900 J of work. What force was used, in newtons?
  8. 8.🏋️ A force of 140 N pushes a cart 7 m along the floor. How much work is done, in joules?
  9. 9.🏋️ A force of 140 N pushes a cart 9 m along the floor. How much work is done, in joules?
  10. 10.🏋️ A force of 240 N pushes a cart 6 m along the floor. How much work is done, in joules?
  11. 11.🏋️ A force of 310 N did 930 J of work. How many metres did the object move?
  12. 12.🏋️ An 18 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  13. 13.🏋️ A force of 210 N did 1050 J of work. How many metres did the object move?
  14. 14.🏋️ A machine lifts a load of 500 N when you push with 100 N. What is its mechanical advantage (MA)?
  15. 15.🏋️ 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?
  16. 16.🏋️ A machine lifts a load of 480 N when you push with 80 N. What is its mechanical advantage (MA)?
  17. 17.🏋️ A machine lifts a load of 240 N when you push with 60 N. What is its mechanical advantage (MA)?
  18. 18.🏋️ A 6 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 machine lifts a load of 360 N when you push with 120 N. What is its mechanical advantage (MA)?
  20. 20.🏋️ A force of 20 N pushes a cart 3 m along the floor. How much work is done, in joules?
  21. 21.🏋️ Pushing a crate 5 m took 50 J of work. What force was used, in newtons?
  22. 22.🏋️ Mechanical advantage (MA) = … (a) load × effort (b) load + effort (c) load ÷ effort (d) effort ÷ load
  23. 23.🏋️ A 9 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  24. 24.🏋️ A force of 200 N did 800 J of work. How many metres did the object move?
  25. 25.🏋️ A force of 60 N pushes a cart 9 m along the floor. How much work is done, in joules?
  26. 26.🏋️ A longer ramp to the same height needs … (a) more effort (b) the same effort (c) less effort (d) no effort
  27. 27.🏋️ A force of 480 N did 2880 J of work. How many metres did the object move?
  28. 28.🏋️ A 17 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  29. 29.🏋️ A smooth ramp is 12 m long and rises 2 m. What effort pushes a 3300 N box up it, in newtons? (ideal ramp, no friction)
  30. 30.🏋️ A smooth ramp is 8 m long and rises 2 m. What effort pushes a 1800 N box up it, in newtons? (ideal ramp, no friction)
  31. 31.🏋️ A force of 200 N did 400 J of work. How many metres did the object move?
  32. 32.🏋️ A force of 220 N pushes a cart 6 m along the floor. How much work is done, in joules?
  33. 33.🏋️ A machine lifts a load of 280 N when you push with 70 N. What is its mechanical advantage (MA)?
  34. 34.🏋️ A force of 90 N pushes a cart 4 m along the floor. How much work is done, in joules?
  35. 35.🏋️ A force of 160 N did 640 J of work. How many metres did the object move?
  36. 36.🏋️ A force of 30 N did 240 J of work. How many metres did the object move?
  37. 37.🏋️ A 20 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  38. 38.🏋️ A smooth ramp is 2 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  39. 39.🏋️ A force of 430 N pushes a cart 3 m along the floor. How much work is done, in joules?
  40. 40.🏋️ A force of 450 N pushes a cart 7 m along the floor. How much work is done, in joules?

Answer key

  1. joule (J)
  2. 5
  3. 6
  4. 760
  5. 130
  6. 3
  7. 190
  8. 980
  9. 1260
  10. 1440
  11. 3
  12. 900
  13. 5
  14. 5
  15. 400
  16. 6
  17. 4
  18. 300
  19. 3
  20. 60
  21. 10
  22. load ÷ effort
  23. 90
  24. 4
  25. 540
  26. less effort
  27. 6
  28. 850
  29. 550
  30. 450
  31. 2
  32. 1320
  33. 4
  34. 360
  35. 4
  36. 8
  37. 200
  38. 800
  39. 1290
  40. 3150

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