When a firework shell moves through empty space and suddenly explodes into many fragments
PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion
Problem
When a firework shell moves through empty space and suddenly explodes into many fragments, no external forces act on the system. Which quantity for the entire collection of fragments is guaranteed to have the same value immediately after the explosion as it had immediately before?
(a) The total kinetic energy of the system
(b) The velocity of the system’s center of mass
(c) The speed of every individual fragment
(d) The total mechanical energy (kinetic + potential) of the system