Saturday 10 September 2011

LINEAR MOMENTUM

We are aware of the fact that a moving object possesses a property by virtue of which it exerts a force on any thing that tries to stop it. The faster the object is moving, the harder is to stop it. Similarly, if two objects move with the same velocity, then it is more difficult to stop the massive of the two. Newton called this property of the moving body as the quantity of motion. This term is now called the linear momentum.
DEFINITION: -
"The linear momentum p of a body is defined as the product of the mass m of the body and its velocity v".
Mathematically it can be expressed as p = m v
Momentum is vector quantity whose direction is that of its velocity v. Every object in motion has a momentum. In SI system its unit is Newton-second.

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