NEWTON’S LAWS. Newton’s First Law An example Also called “Newton’s Law of Inertia”

NEWTON’S LAWS

Newton’s First Law

An example

• Also called “Newton’s Law of Inertia”

Inertia

• An object’s tendency to resist a change in motion

Newton’s Second Law

F = m x a

Newton’s Second Law

• Part 1: Acceleration depends on mass

• Part 2: Acceleration depends on force

Example: Mr. Parzych Bowling

How much force is need for a bowling ball with a mass of 5 kg to be accelerated at a rate of 2 m/s/s?

Example: Mr. Parzych Bowling

F = m x a

F= (5 kg) * ( 2 m/s/s)

F= 10 N

a= 2 m/s/s

m= 5 kg

Action and Reaction Forces

Examples of Force Pairs

Volleyball Spike

Hunting

Golf

Pushing Against A Wall

Balloon Rocket

Effects of Reaction Forces

• Hard to see the effect of the ball pulling on the earth.

• The earth is extremely massive, so it’s acceleration will be infintessimally small

• F= m x a

Momentum• Momentum is the combined mass and velocity of an

object.

Transfer of Momentum

Conservation of Momentum