# Forces Friction

Topics: Force, Friction, Classical mechanics Pages: 3 (868 words) Published: February 26, 2012
Forces
Have you ever wondered how forces link to our life? Everything we’ve learned in science has got me thinking about it. Forces are an essential part of our daily lives. Forces act on all objects. And we need force for everything we do, whether it’s a push, pull or twist. Force gives an object the energy to move, stop moving or change direction. Newton’s first law states that an objects velocity cannot change unless it is acted upon by a force. Here are examples of force in everyday life.

A mother pushing a baby stroller would be an example of a push.

This diagram shows two teams of players while they are pulling the rope in a game of tug-of-war.

Here is one we learned in class:
The up thrust of the water and the weight of the boat ,help the it float.

Though there are many different types of forces but I have chosen to talk to you about friction. Friction is the force between two objects in contact with each other, making it a contact force. It causes moving objects to slow down. Air resistance is a type of friction. Friction is an important force in our lives. We rely on friction in many ways. An athlete usually wears shoes which provide him/her with a greater friction between the shoe and the surface. We rely on friction as an important aspect of motion. Friction can be a very useful force because it prevents our shoes slipping on the pavement when we walk and stops car tires skidding on the road. Ice causes very little friction, which is why it is easy to slip over on an icy day. But this is a good thing for ice skating and sledding. There are two main types of friction: static friction and kinetic friction. Static friction is a force which resists the movement of two objects which are touching each other. A simple example of static friction might be a wooden block sitting on a ramp. Unless sufficient force is exerted, the block will not slide down the ramp, because static friction holds it place and resists...