A rigid circular disc of radius r has its centre at X. A number of forces of equal magnitude F act at the edge of the disc. All the forces are in the plane of the disc.
Which arrangement of forces provides a moment of magnitude 2Fr about X?
2 )
3 )
4 )
تحلیل ویدئویی تست
منتظریم اولین نفر تحلیلش کنه!