Two object are thrown at the same time from a surface wich has an angle of θ. The first pbject is thrown paralel with the surface, with the speed v1. The second object is thrown horizontally with the speed of v2. The objects hit each other at a certain point. What is the distance between the point they were thrown and hit eachother? (The gravitational acceleration is g) The question is translated. It may not be clear ask anything you didn't understand verbally. The thing I want to know is, what equations should I know to solve this by myself?