White House Down Physics Concept - Acceleration
In the movie, the president's limo was parked and within seconds John Cale was driving 50 MPH. This demonstrates Acceleration. Acceleration is the rate of change in velocity, when the velocity of an object changes, the object is accelerating. When John Cale has to slow down, the acceleration decreases while the velocity increases. When the gas pedal was pushed, the vehicle started to go much faster. Acceleration increases the vehicle's speed.