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Distance

a path taken and always a positive number

displacement

A change in position (delta p).

length

A measured distance

Velocity

a speed in a particular direction.

acceleration

(physics) a rate of change of velocity

time

A measure of change between two events or moments.

kinematics

branch of mechanics that explains the "what" and "how" of motion

constant speed

Moving at a steady rate over time

Average Speed

Distance traveled divided by the time required to cover the distance

Average Velocity

Dividing displacement by elapsed time

slope of a line

rise over run; measures how steep a line is; rate of change of a line

Instantaneous Velocity

How fast an object is moving and direction of motion at each instant in time

x-t graph

Position-time graph, whose slope indicates velocity.

v-t graph

Velocity-time graph, whose slope indicates acceleration and whose area indicates displacement

a-t graph

Acceleration-time graph, whose area indicates a change in velocity.

Average acceleration

a = ∆v/∆t

Instantaneous acceleration

Average acceleration as change in time approaches 0

free fall

a state in which an object is gravitationally drawn to the earth's surface and is unaffected by any forces besides weight

Displacement (units)

m with a direction.

Velocity (units)

m/s with a direction.

Acceleration (units)

m/s2 with a direction.

m

A car starts from rest and travels for 5.0 s with a constant acceleration of -1.5 m/s^2. How far does the car travel in this time interval? (units)

m/s

A car enters the freeway with a speed of 6.4 m/s and accelerates uniformly for 3.2 km in 3.5 minutes. How fast (in m/s) is the car moving after this time? (units)

d

Displacement (variable)

v

The index of refraction n is defined as , where c is the speed of light in air, and _______ is the speed of light in a material.

s

arc

a

acceleration (m/s2)

inertia

_______ is the property of an object that leads it to resist any change in motion

force

(interactions between two objects)

net force

Acceleration depends on the

equilibrium

1)starting point of SHM, object is in _______, fnet equals zero

Vector quantity

9.8m/s per second is a

Speed

Units: cm/s, m/s, mi/hr, km/s ...

Scalar Quantity

a measure of magnitude

Physics is...

... the natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.

gravity

(physics) the force of attraction between all masses in the universe

V=^x/^t

Average velocity (slope)

x=xo+vt

Linear equations (position at any time)