269. The maximum frictional force, which comes into play, when a body just begins to slide over the surface of the other body, is known as
270. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as
271. The angle between two forces when the resultant is maximum and minimum respectively are
272. When a rigid body is suspended vertically, and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
273. During elastic impact, the relative velocity of the two bodies after impact is __________ the relative velocity of the two bodies before impact.
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