A nucleus is at rest in the laboratory frame of reference. Show that if it distintegrates into two smaller nuclei, the products must move in opposite directions.

The relative velocity of a body A with respect to a body B is the time rate at which body A changes its position with respect to body B . a)If V_A and V_B are the velocities of A and B moving in opposite directions,what is the relative velocity of A with respect to B ? b)Two trains along the same straight rails are moving with constant velocity of 60km/h and 30km/h towards each other.If at time t=0 ,the distance between them is 90km ,find the time when they collide. c)The velocity time graph of two bodies A and B make angles of 30° and 60° with the time axis,what is the ratio of their acceleration?

Two metal plates A and B are connected to cell of emf 2V is shown in the figure A charged particle starting from rest moves in the opposite direction of electric field, is it an electron or proton?

A large force acting for a short inerval of time is called impulsive force. Two billiard balls each of mass 0.05kg moving in opposite direction with speed 6m/s collide and rebound with the same speed.What is the impulse imparted to each ball due to the other?