AC HPAT Physics Exam Study Guide with Complete Solutions Distance - Correct Answer · Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion.Displacement - Correct Answer · Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.Position - Correct Answer · Position is a place where someone or something is located or has been put.In physics, position is usually a number on an axis. ... Position is a vector, because direction matters. But distance is a scalar. Distance is how far you've traveled.Speed - Correct Answer · Speed is the distance traveled per unit of time. It is how fast an object is moving. Speed is the scalar quantity that is the magnitude of the velocity vector. It doesn't have a direction.Acceleration - Correct Answer · Acceleration is the rate of change of velocity with time.Instantenous velocity - Correct Answer · Instantaneous velocity is the velocity of an object in motion at a specific point in time. This is determined similarly to average velocity, but we narrow the period of time so that it approaches zero. If an object has a standard velocity over a period of time, its average and instantaneous velocities may be the same.A force - Correct Answer a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull Net force - Correct Answer · Net force is the vector sum of forces acting on a particle or body. The net force is a single force that replaces the effect of the original forces on the particle's motion. It gives the particle the same acceleration as all those actual forces together as described by the Newton's second law of motion.Uniform vs. non-uniform motion - Correct Answer · Difference between uniform and non-uniform motion with examples. In Uniform motion, movement of a body is along the straight line with constant 1 / 2
speed. In non uniform motion, movement of a body is along the straight line with variable speed. In uniform motion, body covers equal distance in equal interval of time What is the difference between constant, instantaneous, and average speed? - Correct Answer · constant speed is where the speed is the same throughout and instantaneous speed is speed given at any moment and average speed is a total distance traveled divided by the amount of time it took to travel it.Newtons Laws - Correct Answer Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.The third law states that for every action (force) in nature there is an equal and opposite reaction.Coefficient of friction - Correct Answer · A coefficient of friction is a value that shows the relationship between two objects and the normal reaction between the objects that are involved. ... The coefficient of friction depends on the objects that are causing friction. The value is usually between 0 and 1 but can be greater than 1.Torque - Correct Answer Torque is a measure of the force that can cause an object to rotate about an axis. Just as force is what causes an object to accelerate in linear kinematics, torque is what causes an object to acquire angular acceleration. Torque is a vector quantity Mechanical advantage - Correct Answer · Mechanical advantage is the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.Input vs output force - Correct Answer · The difference between the two is very simple to understand: Input Force represents the amount of force that you put into another object. Output Force represents the force that a specific object has as a result of the input force.Gravitational force - Correct Answer · The gravitational force is a force that attracts any two objects with mass. ... In fact, every object, including you, is pulling on every other object in the entire universe! This is called Newton's Universal Law of Gravitation.
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