If a ball is tossed straight up into the air, at what position is its potential energy the greatest? question 2 options: a) when it is at the top b) when it is getting near the top c) when it leaves your hand d) when it starts to fall back to your hand

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.