Motion + Forces (unfinished)

Vector quantity

Quantities with a magnitude and direction

Scalar quantity

Quantities with a magnitude but no direction

Position

Location, depends on reference frame

Often referred to as x

Vector quantity

Velocity

How quickly a position changes

V = change in position over time take

Vector quantity

Speed

How quickly the distance is travelled

Speed = distance/time

Scalar quantity

Measured in meters per second

Acceleration

Rate of change in velocity

Acceleration = change in velocity / time taken

Measured in meters per second squared (meters per second per second)

Vector quantity

Encompasses speeding up and slowing down as well as changing directions

When acceleration is a positive number

The object is speeding up or changing direction

When acceleration is a negative number

The object is slowing down

When acceleration is 0

Object is at a constant speed or at rest

What is the oil drop diagram?

The oil drop diagram is a series of dots that show an object’s position at equal time intervals

What does the spacing for oil drops indicate

The oil drops stay evenly spaced when an object is at rest

The oil drops get progressively closer together when an object is slowing down

The oil drops get progressively further apart when an object is speeding up