Speed

How fast an object is moving = D/T

Velocity

An objects speed and direction =D/T

Acceleration

Changing velocites

Positive Acceleration

Speeding up

Negative Acceleration

Slowing down

Reference Point

A location or object that is being used to compare another objects motion

What type of motion does this show?

Backwards constant velocity

the distance is decreasing from 3 to 0

What type of motion does this show?

Constant Speed or Constant Velocity

What type of motion does this show?

Speeding up

What type of motion does this show?

Constant Speed or Constant Velocity

What type of motion does this show?

Not moving

The distance stays at 3 m the entire time

What type of motion does this show?

Slowing down

The slope of the line starts high (fast motion) then flattents out (slow motion)

What type of motion does this show?

Constant Velocity

The velocity of the line is always 5 m/s

What type of motion does this show?

Not Moving

Velocity is always zero

What type of motion does this show?

Decreasing Velocity or Slowing Down

V starts at 5 and decreases to 0

Assume these are all Velocity vs Time graphs. Which shows backwards motion?

Graph D

it shows a negative velocity which is backwards motion

What type of motion does this show?

Increasing Velocity or Speeding UP

V starts at 0 and decreases to 10

You are on a train taveling at 10 m/s to the north with the ground as the reference point. You are seated next to your best friend. How fast are you moving compared to your friend?

0 m/s

You are on a train taveling at 10 m/s to the north with the ground as the reference point. You you walk to the front of the train at 2 m/s. How fast are you moving compared to the ground?

12 m/s north

You are on a train taveling at 10 m/s to the north with the ground as the reference point. You you walk to the front of the train at 4 m/s. How fast are you moving compared to the ground?

14 m/s North

You are on a train taveling at 10 m/s to the north with the ground as the reference point. You you walk to the back of the train at 2 m/s. How fast are you moving compared to the ground?

8 m/s north

You are on a train taveling at 10 m/s to the north with the ground as the reference point. You you walk to the back of the train at 7 m/s. How fast are you moving compared to the ground?

3 m/s north

You are on a train taveling at 10 m/s to the north with the ground as the reference point. You you walk to the back of the train at 12 m/s. How fast are you moving compared to the ground?

2 m/s south

You are seated on a train taveling at 10 m/s to the north with the ground as the reference point. Your friend is seated on a train headed south on the same track at 15 m/s. How fast is your friend moving with you as the reference point?

25 m/s south