Here's the problem: A cat is chasing a mouse. The mouse runs in a straight line at a speed of 1.5 m/s. If the cat leaps off the floor at a 30 degree angle and a speed of 4.0 m/s, at what distance behind the mouse should the cat leap in order to land on the poor mouse? Now, I know I need to use the distance equation for projectiles (ie, the cat) that land at the same elevation as it was fired. But I don't understand this in comparison to the mouse. Anyone?