Question1

A projectile is launched at 28 m/s at 22 degrees (above horizontal) from the top of a building that is 62 meters above ground. It is fired from the building's edge. How far horizontally, does projectile land from the base of the building in meters? 

Question2

Film camera. A 35mm camera has a standard lens with focal length 50mm and can focus on objects between 45cm and infinity.

(a) Is lens for such camera a concave or a convex lens?

(b)The camera is focused by rotating the lens, which moves it on the camera body and changes its distance from the film. In what scope of distances between the lens and the film plane have to the lens move to focus correctly over the 45cm to infinity range?