What is prosocial behavior? a. just to out, with no other reason. b. being a loner and having few friends. c. being sociable and having lots of friends. d. any action that is meant to others.

D. Any action that is meant to help others

Explanation:

Prosocial behavior are basically helping actions. Any form of actions that is done that benefits others. Although, A may fit the bill, the difference is that it describes altruism. Prosocial behavior is just the action taken, not considering the motivation.

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j