# PHY1Exam1.text

 Define Velocity? How fast something is moving (its speed) and in what direction it is moving. Define Acceleration? Rate of change in velocity. Define Displacement? The direction and distance of the shortest path between an initial and final position.The direction and length of the shortest path from the initial to the final position of an object’s motion. Δx = xf − xi Δx = displacement xf = final position xi = initial position Units: meters (m) Define magnitude? the magnitude − the amount − of the displacement. Define Velocity? It is the measure of how fast and in which direction the motion is occurring.-represented by v.-Velocity has the dimensions of length divided by time; the units are meters per second (m/s). Δx = displacement Δt = elapsed time Units: meters/second (m/s) How to calculate average velocity? Define Average Velocity? equals displacement divided by the time it takes for the displacement to occur. Instantaneous Velocity? Velocity at a specific moment. Define Acceleration? Acceleration measures the rate at which an object speeds up, slows down or changes direction. Any of these variations constitutes a change in velocity. The letter a represents acceleration. Define Average Acceleration? Average acceleration: The change in instantaneous velocity divided by the elapsed time. Define Instantaneous Acceleration? Instantaneous acceleration: Acceleration at a particular moment. Define Free-fall acceleration? Free-fall acceleration: Rate of acceleration due to the force of Earth's gravity. Authoriamsolo24 ID33072 Card SetPHY1Exam1.text DescriptionPHY1Exam1 Updated2010-09-07T03:13:19Z Show Answers