A blue puck with a mass of 4.30×10?2kg , sliding with a speed of 0.190m/s on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass m, initially at rest. After the collision, the velocity of the blue puck is 3.0×10?2m/s in the same direction as its initial velocity.
Find the magnitude of the velocity of the red puck after the collision.
Find the direction of the velocity of the red puck after the collision.
Find the mass m of the red puck.