A steel sphere of mass 100 gm moving with a velocity of 4m/s collides with a dust particle elastically moving in the same direciton with a velocity of 1m/s. The velocity of the dust particle after the collision is

A steel sphere of mass 100 gm moving with a velocity of 4m/s collides

1.	A steel sphere of mass 100 gm moving with a velocity of 4m/s collides with a dust particle elastically moving in the same direciton with a velocity of 1m/s. The velocity of the dust particle after the collision is
Answer» 8m/s 7 m/s 6m/s 9 m/s Answer :B