http://www.ck12.org Chapter 9. Rotational Motion
Example 2Some old doors have the door knob in the center of the door like in the picture below. If you had a door of mass 20
kg and 1.5 m wide, what would be the angular acceleration if you pushed at the center of the door with a force of 50
N? What would the angular acceleration be if you pushed at the far end of the door with the same force? Where
should you push the door if you want to open it the fastest?