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