question_answer

  A cracker of mass 100 g explodes into two pieces of equal mass. Show that these two pieces of the cracker fly in opposite direction.

Answer:

                  Mass of a cracker,                 Initially, cracker is at rest i.e., u = 0 Therefore, initial momentum of the cracker = mu = 0                                                                      (1) After explosion, mass of each piece and Let, velocity of first piece  velocity of second piece Momentum of cracker after explosion Applying law of conservation of momentum Total final momentum = Total initial momentumor The negative sign shows that  and  are equal in magnitude and opposite in direction. Thus, two pieces of the cracker fly in opposite directions with same speed.