Physics Chapter 1 & 2 Notes

Straight

A _______ line on a position-time graph represents uniform motion

Acceleration

A vector quantity that represents the rate of change of velocity

At Rest

An object __ ___ is a horizontal line but it is still undergoing uniform motion because its change in position remains constant over equal time intervals.

Accelerating

An object is ________ if it is speeding up, slowing down or changing direction.

Acceleration

Finding the slope of a velocity-time graph gives you an object's _________

Parabola

Galileo determined that the motion of a projectile, neglecting air resistance, follows the curved path of a ______

Downward

Gravity influences the vertical motion of a projectile by accelerating it _______. Gravity does not effect an object's horizontal motion

Collinear

Motion in one dimension involves vectors that are _______

Acceleration

Another name for non-uniform motion is _______

Zero

If an object experiences uniform motion, acceleration - a = _______

Horizontal, Zero

If an object is moving at a constant velocity, a velocity-time graph would have a straight _______ line and its acceleration is ______

Uniform Motion

If an object moves at constant velocity (constant magnitude and direction) and the object is undergoing ______ _____

Zero

If an object starts from rest, the initial velocity - vi = _____.

Zero

If the object comes to a stop, the final velocity - vf = _____.

Tail, Tip

In a diagram, a line segment with an arrowhead represents a vector quantity. Its point of origin is called the ___ and its terminal point (arrowhead) is the ___

Velocity

It is a vector quantity, so it has both magnitude (speed) and direction

Speed

Rate at which an object moves. It is a scalar quantity so it has magnitude only

Velocity

Reading the velocity-time graph gives you instantaneous _______ values

Velocity

Since displacement is a vector quantity, the slope of a position-time graph gives you ______

Position-Time

Slope = rise/run but for _______ graphs, this equation becomes the slope = change in position/change in time

Displacement

The area under a velocity-time graph gives you the object's ________

Acceleration

The slope of a velocity-time graph gives you __________

Acceleration

The velocity-time graph for an object undergoing uniform motion is a horizontal line (with zero slope). Similarly, a horizontal line on an acceleration-time graph indicates uniform _________

Gravity

When an object is thrown up, the decrease in velocity occurs because the object experiences acceleration downward due to ____

Opposite, Same

When velocity and acceleration have _____ directions, the object is slowing down. When the directions of velocity and acceleration is the _____ (positive or negative) the object is slowing down, the object is speeding up

Average

When you calculate velocity over a time interval rather than at an instant in time, the velocity is called the _______ velocity

Intersect

When you represent the motions of 2 objects on the same graph you can tell whether the objects are approaching or moving apart. When the 2 lines _____, both objects have the same position so the objects meet at this point.

Increases, Decreases

When you throw an object up, its height (displacement) ____ while its velocity ________

Average Velocity

You can determine the _______ _______ of an object over a time interval from a velocity-time graph

Projectiles

_______ include objects dropped from rest; objects thrown downward or vertically upward and objects moving upward at an angle.

Y-Direction

__________: -If up is positive, acceleration due to gravity is negative or down -General equation for the initial y component of the velocity can be determined using trigonometry e.g. vi = visinθ -The displacement in the y direction is dy -Time is the same in both x and y direction

X-Direction

__________: -There is no acceleration in this direction. The projectile undergoes uniform motion in the x direction -General equation for the initial x component of the velocity can be determined using trigonometry e.g. vi = vicosθ -The range is dx -Time is the same in both x and y direction