Chilling footage shows the moment Ukrainian forces ambushed a column of Russian tanks — deploying a lethal combination of missiles, armored drones, landmines and machine-gun fire to annihilate the ...

A group of six mechanics were working out of a warehouse on the tanks and weapons, NYT reported. Ukraine said on Saturday Russian troops were withdrawing from Kharkiv after weeks of shelling.

In your study of statics, you have learned that if forces act at only points points on a rigid body, then the resultant forces acting at these two points must be collinear in order for the body to be ...