HESI A2 – Physics Exam Questions with Complete Solutions

Average Speed - ANSWER-the distance an object travels divided by the time the object travels without regard to direction of travel average speed = d/t Velocity - ANSWER-refers to speed in a specific direction Scalar Quantity - ANSWER-quantity described simply by a numeric value and is expressed in units of magnitude Vector Quantity - ANSWER-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 - ANSWER-determined by averaging the initial speed and the final speed of the object Acceleration - ANSWER-the rate of change in velocity over a period of time Projectile Motion - ANSWER-it is possible for an object to display two types of motion simultaneously Force - ANSWER-defined as a push or a pull on an object Newton's First Law of Motion - ANSWER-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 - ANSWER-the constant of proportionality is equal to the mass of the object; F=ma Newton (N) - ANSWER-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 - ANSWER-states that for every action there must be an equal and opposite reaction Friction - ANSWER-a force that opposes motion and is expressed in newtons Centripetal Acceleration - ANSWER-rotational motion equivalent of acceleration Kinetic Energy - ANSWER-the energy resulting from the motion of the object