question_answer 51)

                  What is momentum? Write its Sl unit. Interpret force in terms of momentum. Represent the following graphically (i) momentum versus velocity when mass is fixed. (ii) momentum versus mass when velocity is constant.

Answer:

  Momentum The quantity of motion possessed by a moving body is known as momentum of the body. Momentum of an object of mass m moving with a velocity v is the product of it. It is denoted by p p= mv Its Sl unit is . As from Newton's lInd law, rate of change of momentum is equal to force applied. So,                                   Hence, force applied on an produces acceleration,           (i)Momentum versus velocity when mass is fixed,                           If m is fixed, then             Momentum versus velocity graph will be a straight line passing through the origin (if v = 0, then p = 0).         (ii) Momentum versus mass graph when velocity is constant for different body                                 If velocity is constant for different masses, then         So, the momentum versus mass graph will be a straight line passing through the origin (if m = 0, then p= 0).