A mass of 10 gm, moving horizontally with a velocity of 100 cm/sec, strikes the bob of a pendulum and sticks to it. The mass of the bob is also 10 gm. The maximum height to which the system can be raised is ( g=10 m/sec2 )
(1) Zero
(2) 5 cm
(3) 2.5 cm
(4) 1.25 cm