AP Physics- Kinematics

On a position-time, how do you determine how far from the detector an object moves?

To determine how far from the detector an object is located, look at the vertical axis of the position-time graph.

On a position-time, how do you determine how fast an object moves?

To determine how fast an object is moving, look at the steepness (i.e. the slope) of the position-time graph.

On a position-time, how do you determine what way an object moves?

To determine which way the object is moving, look at which way the position-time graph is sloped.

On a position-time, a front slash means?

A position-time slope, like a front slash / means the object is moving away from the detector.

On a position-time, a back slash means?

A position-time slope, like a backslash \, means the object is moving toward the detector.

How do you find instantaneous velocity?

Instantaneous velocity is found by taking the slope of the tangent line to a position-time graph.

What is displacement?

Displacement indicates how far an object ends up from its initial position, regardless of its total distance traveled.

What is the average velocity?

Average velocity is displacement divided by the time interval over which that displacement occurred.

What is instantaneous velocity?

Instantaneous velocity is how fast an object is moving at a specific moment in time.

On a velocity-time, how do you determine how fast an object moves?

To determine how fast an object is moving, look at the vertical axis of the velocity-time graph.

On a velocity-time graph, how do you determine which direction an object moves?

To determine which way the object is moving, look at whether the velocity-time graph is above or below the horizontal axis.

On a velocity-time, how do you determine if an object moves away from the detector?

An object is moving away from the detector if the velocity-time graph is above the horizontal axis.

On a velocity-time graph, how do you determine if an object moves towards the detector?

An object is moving toward the detector if the velocity-time graph is below the horizontal axis.

On a velocity-time, how do you determine how far an object moves?

To determine how far an object travels, determine the area between the velocity-time graph and the horizontal axis.

On a velocity-time, how do you determine where the detector is?

On a velocity-time graph, it is not possible to determine how far from the detector the object is located.

On a velocity-tim graph, what type of line is motion represented by?

Most everyday motion can be represented with straight segments on a velocity-time graph.

On a velocity-time graph, how do you determine acceleration?

The slope of a velocity-time graph represents acceleration.

What is acceleration?

Acceleration tells how much an object's speed changes in one second.

What is acceleration when an object speeds up?

When an object speeds up, its acceleration is in the direction of motion.

What is acceleration when an object slows down?

When an object slows down, its acceleration is opposite the direction of motion.

What do objects in free fall do?

Objects in free fall gain or lose 10 m/s of speed every second.

What is the equation for the distance traveled when an object is moving at a steady speed?

When an object is moving at a steady speed v, it travels a distance given by d = vt.

What is the equation for the distance traveled when an object starts at rest and speeds up, or when an object slows to a stop?

When an object starts at rest and speeds up, or when an object slows to a stop, the distance traveled is given by d=1/2at^2 and d=v^2/2a

What is the first step in Algebraic kinematics?

Define a positive direction.

What is the second step in Algebraic kinematics?

Indicate the portion of the motion.

What is the third step in Algebraic kinematics?

Fill out a kinematics chart.

How many variables are in algebraic kinematics to complete the problem?

3 of 5

Algebraic kinematics equation starting with Vf:

VVf = Vo +at

Algebraic kinematics equation starting with ^x:

^x= VVot +1/2at^2

Algebraic kinematics equation starting with Vf^2:

Vf^2= Vo^2+ 2a^x

How many g in 1 kg.?(material within object)

1000g in 1 Kg

What's Earth's gravitational field?

On Earth's surface, the gravitational field is 10 N/kg. This means that on Earth, 1 kg of mass weighs 10 N.

What's the normal force?

Normal forces act perpendicular to a surface.

What defines an object in equilibrium?

An object is in equilibrium if it is moving in a straight line at a constant speed. This includes an object that remains at rest.

When do objects experience forces?

When in contact.

Acceleration is in the direction of the forces…

An object's acceleration is in the direction in which the forces are unbalanced.

Net force is in the direction of the force…?

An object's net force is in the direction in which the forces are unbalanced.

What direction is the net force? Provide an equation.

In the direction of acceleration. a=Fnet/ m

What is friction?

The force of friction is the force of a surface of an object acting along the surface.

What direction is the force of friction?

The force of friction acts in the opposite direction to an object's motion.

What is the coefficient of friction?

The coefficient of friction is a number that tells how sticky two surfaces are.

What is the equation to find the coefficient of friction?

The force of friction is equal to the coefficient of friction times the normal force. Ff= μFn