Calculate the kinetic energy of a 0,6kg ball when it is thrown and reaches a speed of 5 m/s

A) 7J
B) 6J
C) 10 J
D) 7,5 J
E) 16 J

What object a collides with object b and bounces back its final momentum is?

What determines the amount of inertia an object has

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?