

Speed Velocity Acceleration Constant Acceleration Free Fall Forces and Newton's Law Kinetic Energy Potential Energy Free Fall Forces Conservation of Energy Conservation of Momentum PHYSICS LINKS Thinkquest Physics LibraryPhysics Zone Multimedia Physics Studio 
Velocity The term velocity has almost the same meaning as speed except for one distinguishing feature: speed is referred to as a scalar quantity which means that it describes only magnitude (number) not direction. However, when physicists talk about velocity they are measuring two things, magnitude and direction, which give an idea of where an object is moving. The following formula is used to calculate the average velocity of
a moving object.
Problem: Solution: Step 1: In this problem we are given the direction of the airplane. Therefore
in order to calculate the distance we need to use average velocity instead
of average
speed, and our formula would be the following: average velocity = 250 km/hr, time = 3 hr Step 2: In order to calculate distance, multiply the average velocity by the elapsed time. Answer: The airplane travels 750 km. 