force and motion

12

Upload: jinelle-taylor

Post on 31-Dec-2015

26 views

Category:

Documents


0 download

DESCRIPTION

Force and Motion. Force. A push or a pull. Now I’m in St. Louis. I was in Kansas City. Motion. A change in position. Frame of Reference. All the things around you that help you describe motion. When you watch a runner he is moving, but the trees behind him are not. - PowerPoint PPT Presentation

TRANSCRIPT

A push or a pull

A change in position.

I was in Kansas City.

Now I’m in St. Louis

All the things around you that help you describe motion.

When you watch a runner he is moving, but the trees behind him are not.

When you are the runner everything you pass seems to be moving.

Motion that is described based on a frame of reference.

Relative to the trees the runners are moving.

The trees are also moving because of the Earth’s rotation, but they don’t seem to be moving because there is no frame of reference.

A certain place

Right of the bookshelf

Left of the bookshelf

On top of the bookshelf

How fast something is moving-the measure of an object’s change in position during a unit of time.

I can go 100 miles per hour (MPH) if I

want to.

Any change in speed or direction of an object’s motion.

Slower

Faster

Curve

Turn

Stop

Start

A unit to measure force.

A force that pulls objects toward each other. It keeps you on earth.

A force that keeps objects that are touching each other from sliding past each other easily.

A measure of the force of gravity on an object. I weigh

less on the moon than on Earth.On Jupiter I

weigh twice as much as

I do on Earth.