- Linear momentum of a body is the quantity of motion contained in the body.
- It is measured in terms of the force required to stop the body in unit time.
- It is measured as the product of the mass of the body and its velocity i.e., Momentum = mass × velocity.
If a body of mass m is moving with velocity v then its linear momentum p is given by p = m v
- It is a vector quantity and it’s direction is the same as the direction of velocity of the body.
- Units : kg-m/sec [S.I.], g-cm/sec [C.G.S.]
- Dimension : [ M L T‾¹]
- If two objects of different masses have same momentum, the lighter body possesses greater velocity.
p = M1V1 = M2V2= constant
i.e V∝1/M [As p is constant]
- For a given body p∝ v
- For different bodies at same velocities p∝m