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# In the given figure , a ball strikes a rod elastically and the rod is hinged at point A. Then which of the statements is / are correct ?

a) linear momentum of system (ball +rod) is conserved.

b) angular momentum of system about hinged point A is conserved

c) initiated KE of system is equal to final KE of system

d) linear momentum of ball is conserved

Since there are external reaction forces at the hinge A.
linear momentum of system will not be conserved.
Angular momentum will be conserved only about A .since external torque about A is zero.
Since collision is elastic kinetic energy will be conserved.