What characteristics are shared by all alkali metals and alkaline earth metals? 1.They conduct electricity very well.
2.They form alkaline solutions when mixed with water.
3.They do not react with water at all.
4.They are strong and shiny.

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.