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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

1 Answer

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.
answered Nov 28, 2013 by meena.p

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