Question

If a projectile explods in mid air then just before and just after explosion, choose correct option(s)
A. Cronservation of momentum is applicable
B. Path of the centre of mass of the projectile must be same original parabola till any one part of it, his the ground
C. Energy relased druing explosion is equal to increase in kinetic energy of the projectile
D. Conservaton of momentum is not applicable.

Answer 1

Gravity is non impulsive hence momentum conservation is valid. Centre of mass do not change original part because before and after explosion net force mg on system is same. Energy relased=gain in kinetic energy.