HESI A2 - Physics (QUESTIONS AND ANSWERS )2022

Average Speed the distance an object travels divided by the time the object travels without regard to direction of travel average speed = d/t Velocity refers to speed in a specific direction 00:22 01:11 Scalar Quantity quantity described simply by a numeric value and is expressed in units of magnitude Vector Quantity quantity describing the time rate of change of an object's position and must be expressed in both units of magnitude and direction of motion Average Velocity determined by averaging the initial speed and the final speed of the object Acceleration the rate of change in velocity over a period of time Projectile Motion it is possible for an object to display two types of motion simultaneously Force defined as a push or a pull on an object Newton's First Law of Motion states that the body at rest will remain at rest, and the body in motion will remain in motion with a constant velocity, unless acted on by an unbalanced force; F=ka Newton's Second Law of Motion the constant of proportionality is equal to the mass of the object; F=ma Newton (N) the unit of force and is equal to the force necessary to accelerate a mass of one kilogram one meter per second per second Newton's Third Law of Motion states that for every action there must be an equal and opposite reaction