Question

a body at rest explodes into pieces which fly in all directions. what is the total momentum of all the pieces immediately after explosion?​

Answer 1

The correct answer to the question is       

CALCULATION:

As per the question, the bomb explodes into two parts.

The masses of two parts are given as

The momentum of two parts are given as .

We are asked to calculate the kinetic energy.

The momentum of  a body is defined as the product of mass with velocity.

Mathematically momentum p = mv.

The kinetic energy of  a body moving with velocity v is calculated as

                                     

                                             

                                             

Hence, the kinetic energy of the first part

The kinetic energy of the second part

Hence, the total kinetic energy K.E =

                                                           =          [ans]