POLICE PLANE AND PICK UP TRUCK PROBLEM

POLICE AGENTS, FLYING LOW OVER A STRAIGHT ROAD, WISH TO DROP AN EXPLOSIVE ONTO THE BACK OF A MASTER CRIMINAL'S PICK UP TRUCK WHICH IS DRIVING ON THE ROAD. THE TRUCK IS SMUGGLING CASES OF VEGAMITE AND MUST BE STOPPED OR THE CASES DESTROYED.

BOTH THE AIRPLANE'S FLIGHT PATH AND ROAD ARE HORIZONTAL. THE (CONSTANT) SPEED OF THE AIRPLANE IS VA AND THE (CONSTANT) SPEED OF THE TRUCK IS VC, AND THE AIRPLANE IS A (CONSTANT) HEIGHT H ABOVE THE TRUCK. AS SEEN FORM THE POLICE AIRPLANE, AT WHAT ANGLE q FROM THE HORIZONTAL SHOULD THE CAR BE WHEN THE BOMB IS RELEASED? AIR RESISTANCE MAY BE NEGLECTED.

ASSUME VA > VC .