Why Take Physics?

1. Why Take Physics?

2. What is Physics? • Physics is the study of matter and energy and their relationship. • Math is a required skill for taking physics. • Physics isn’t a walk in the park, you must have good work ethics to be successful.

3. Everything has to do with Physics! • There are so many activities that occur everyday that have to do with physics. • People who do not take physics really have no understanding of the science that occurs behind these events. • Physics can teach one what happens when say two cars collide or two people of different weight get on a see saw. It even teaches you all about the sun and the moon. • Physics is a very vital topic to know if you want to be knowledgeable about the world and what is going on around you.

4. Speed and Acceleration Speed, also known as velocity, is how fast an object is moving. Velocity = Distance x Time Distance being how far the object is from a given point. Time being how long it takes for the object to reach that point. A = V/ T The velocity is the final velocity minus the initial velocity. The time is how long it took this change to happen (final time-initial time). Velocity and acceleration are vector quantities. They can be negative values depending on their direction.

5. Knowing about speed and acceleration can help you when it comes to driving a car. It will help you understand more about how long it will take you to change speeds and how far from a stoplight you should start slowing down. This will help you have better control over your car. • http://www.fearofphysics.com/Xva/xva.html

6. Doppler Effect

7. http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/ClassMechanics/Doppler/DopplerEffect.htmlhttp://faraday.physics.utoronto.ca/PVB/Harrison/Flash/ClassMechanics/Doppler/DopplerEffect.html The Doppler Effect can be of assistance when you are trying to find out where a sound is coming from. Sound radiates 360° and the closer the waves get to you the louder the sound will be. The frequency is higher when the object is moving towards you and lessens after it passes you. Sound will differ depending on where the receiver is and if it is still or moving.

8. Projectile Motion

9. http://www.mnstate.edu/lindaas/phys200/Lab/Sims/projectile.swfhttp://www.mnstate.edu/lindaas/phys200/Lab/Sims/projectile.swf • There are two directions to every projectile, horizontal and vertical. • The motion of a projectory is described in terms of its position, velocity, and acceleration. (change) • X = Vx(T) X= horizontal displacement • Y = Vy(T) + ½gT² Y= vertical displacement • The projectile does not accelerate horizontally, but will accelerate vertically due to gravity (-9.8m/s²). • Knowing the trajectory of the projectile can help you understand the science behind such things as golfing, football, or simply any object being thrown or dropped.

10. Sunsets

11. Sunsets appear reddish orange because the longest wavelengths of the spectrum (ROY) are the only ones to reach our eyes.

12. http://www.upscale.utoronto.ca/GeneralInterest/Harrison/Flash/http://www.upscale.utoronto.ca/GeneralInterest/Harrison/Flash/ • http://www.fearofphysics.com/index1.html • http://www.mnstate.edu/lindaas/phys200/Lab/phys200lab.htm