A moving body of mass m and velocity 3 km/h collides with a rest body – McqOptions

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1.	A moving body of mass m and velocity 3 km/h collides with a rest body of mass 2m and sticks to it. Now the combined mass starts to move. What will be the combined velocity [CBSE PMT 1996; JIPMER 2001, 02]
A.	3 km/h
B.	2 km/h
C.	1 km/h
D.	4 km/h
Answer» D. 4 km/h

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