Physics Formulas for falling objects

Question

Hello all, I am wanting to create a program where a user can enter the mass of an object, the gravity level and the height of where this object will be dropped. There is no elemental factors involved so wind and resistance isnt an issue. At the end of this, the user will find out how long it will take for the object to hit the ground, how much force it will hit it with and the velocity in which it travelled at. Thanks for your help!