# Newton's law and simple machines

## Newton's first law of motion

Newton's first law of motion - sometimes referred to as the law of inertia. first law motion says that unless a net force acts on an abject, the object will remain in constant speed will continue to move in a straight line and at a constant speed.

• Newton's first law of motion - sometimes referred to as the law of inertia

## Newton's second law of motion

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

• Newton's second law motion discribes how acceleration, mass, and net force are related. Acceleration is the rate at which the velocity of an object changes over time.

## Newton's third law of motion

Newton's third law motion states that when one object exerts a force on a second object, the second exerts a force on the first object.

• This law is exemplified by what happens if we step off a boat onto the bank of a lake: as we move in the direction of the shore, the boat tends to move in the opposite direction (leaving us facedown in the water, if we aren't careful!).

## This is 1,2,3 law of motion

First law:When viewed in an inertial reference frame, an object either remains at rest or continues to move at a constant velocity, unless acted upon by an external force.

Second law:The vector sum of the forces F on an object is equal to the mass m of that object multiplied by the acceleration vector a of the object: F = ma.

Third law:When one body exerts a force on a second body, the second body simultaneously exerts a force equal in magnitude and opposite in direction on the first body.
Newton's Laws of Motion for kids -Grade 4th,5th,6th Quiz

## A video explaining Newton's law of motion

Watch the video and see how Newton's law of motion. After your done watching the video write down notes about Newton's law of motion.

## Inclined plane

A flat surface with one end higher than the other.

## Wedge

An object that thick at one edge, tapered to a thin edge at the other.

## Screw

An inclined plane that is wrapped around a cylinder.

## Lever

A straight bar that pivots on or around a fulcrum.

## Wheel and axle

A wheel attached to a bar so that they rotated together.

## Pulley

A chain, belt, or rope wrapped around a wheel.
Bill Nye Simple Machines_0001.wmv

## Simple machines video

I want you to watch this video on simple machines and after your done tell you parents about the video that you watch about simple machines.
Simple Machines Song

## Simple machine song

Here the song about simple machines. You will learn about simple machines if you watch this video.
Newton's Laws of Motion Song

## Newton's laws of motion song

Watch this video and here the song of Newton's laws of motion. You will learn a lot about Newton's laws

## introduction

Simple machines are very cool because you can use them a lot for building. Newton's law of motion is very intesting because You learn about motion. Have you ever heard of seen or even use simple machines? Have you ever seen or heard of Newton's law of motion? If you haven't well here it goes you will learn so much from my flyer.