NEWTON’s FIRST LAW of MOTION. The LAW (#1)LAW An object at rest remains at rest, and an object in motion remains in motion at the constant speed and in.

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Presentation transcript:

NEWTON’s FIRST LAW of MOTION

The LAW (#1)LAW An object at rest remains at rest, and an object in motion remains in motion at the constant speed and in a straight line unless acted on by an unbalanced force.

Part 1: Objects at rest An Object at rest is…. A.) not moving B.) moving

Part 1: Objects at rest An Object at rest is…. A.) not moving B.) moving

Objects at rest, such as a chair, desk, book, etc…, will not move by itself unless a force is placed on it. AHHHH… GHOST!!!

At rest (not moving) Unbalanced force (moving)

Part 2: Objects in Motion Moving objects will continue to move forever in the same velocity unless an unbalanced force acts on them.

KNOWLEDGE check Scenario… You are riding a bus to school. When you finished your candy bar, you stand up to walk to the front of the bus. SUDDENLY, a mouse runs in front of the bus and the bus driver slams on his brakes (he loves mice)……. What will happen to you? why?

Friction and Newton’s first law Newton says, “an object in motion will stay in motion forever…unless acted on by a unbalanced force. If you push your desk, what will happen? HHmmmm……….

Will it move forever??? Preston pushing with all of his strength What makes it stop?

FRICTION!!!! Friction- a force that opposes motion between two surfaces that are in contact. what if Preston was moving a chair, or a stroller, or a ball? I forget what friction is!!!! Kali

Inertia and Newton’s first law Newton’s first lawlaw of inertia InertiaInertia- the tendency of an object to resist being moved, or if the object is moving, to resist a change in speed or direction until an outside force acts on the object. OR The tendency of an object to resist any changes in motion.

Mass and Inertia The smaller the mass, the less the inertia Small/light objects are easier to move, or stop from moving. Large/heavy objects are harder to move, or stop from moving.

Wile E Coyote Watch CLIP and write down 3 examples of when Newton’s first law of motion CLIP was demonstrated. What forces did you notice?

ONE person from each table, get a beaker, a note card, and a penny. Directions: 1.Place note card and penny on cup as seen here 2.Attempt to flick the card so that the penny will fall into the beaker. How does this relate to Newton’s first law??