A 30-kg object sitting at rest is struck elastically in a head-on collision with a 10-kg object initially moving at +3.0 m/s. Find the final velocity of the 30 kg object after the collision.
A) "-1.0 m/s"
B) "+1.2 m/s"
C) "+1.5 m/s"
D) "+2.0 m/s"

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The Answer of A 30-kg object sitting at rest is struck elastically in a head-on collision with a 10-kg object initially moving at +3.0 m/s. Find the final velocity of the 30 kg object after the collision.
A) "-1.0 m/s"
B) "+1.2 m/s"
C) "+1.5 m/s"
D) "+2.0 m/s"

A 30-Kg Object Sitting at Rest Is Struck Elastically in a Head-On