Alguien que me apoye con este ejercicio ?

What is the final velocity of the initial velocity of 25 and -50?

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Imagine that the rightward current flows in the rod for a short time. as a result, what will the net charge on the right and left ends of the rod become? left end negative and right end positive left end negative and right end negative left end negative and right end nearly neutral left end nearly neutral and right end positive both ends nearly neutral