Final answer:
In an elastic collision between two objects with equal mass, the velocity after the collision can be calculated using the equation m1*v1 + m2*v2 = m1*v1' + m2*v2'. The velocity after the collision for the red ball is 20 m/s and for the blue ball is 10 m/s.
Step-by-step explanation:
In an elastic collision between two objects with equal mass, the total momentum is conserved.
The initial momentum is equal to the final momentum. We can represent this mathematically using the equation:
m1*v1 + m2*v2 = m1*v1' + m2*v2'
Using the given values and solving for v1' and v2', we find that the velocity after the collision will be:
v1' = 20 m/s (for the red ball) and v2' = 10 m/s (for the blue ball).