Force and Motion

Newtons laws and simple machines

What is force and motion?

Force and motion is all around us. It is even beside you right now. We need help to move things that why we use simple machines, and compound machines. Did you know that force and motion also have laws? They are called Newton's laws of motion. These laws help us to discribe what is a force and what is a motion, and how that are related.

Newtons First law

Force and motion have laws. These laws are called Newtons laws of motion. The first law is called The Law of Intertia. It states that an object at rest stay at rest and an object in motion stays in motion with the same speed and same direction unless acted upon by an unbalanced force. For example, if you lay a pencil down it will not move unless it is touched.

Newtons second law

Newton's second law of motion is F=ma. What this means is that force equals mass times acceleration. This law states that the acceleration of an object is dependent upon two different varibles-the net force acting upon the object and the mass of the object.

Newtons third law

newtons third law of motion is action and reactions forces. This law states that for every action there is an equal and opposite reaction. for example if you are bouncing a ball, that ball will come back at you.

Simple machines

Simple machines help everyone around the world every day. Even you. A simple machine is any of the basic mechanical devices for applying a force. Such as an inclined plane, lever, wedge, screw, wheel and axel. They can help you because they make work easier.

What force and motion mean

Force means using energy to do work. Pushing and pulling are kinds of work. An example of a force is that if you push someone that's a force to make them fall. Motion means the change in the position of an object because of a force. A example is that the person you pushed fell and falling is the motion.

http://m.youtube.com/watch?v=MztWyY9z1jY