# physics lecture 1

 The five steps to solving a physics question confidence, diagram, system, formula, plug n chug This is a physical quantity that has magnitude but no direction scalar this has a physical quantity with both magnitude and direction. Can be represented by an arrow A vector A2 + B2 = C2 Pythagorean Theorem What does SOH CAH TOA stand for? Sine Opposite over hypotenuseCosine adjacent over hypotenuseTangent opposite over adjacent Any vector can be replaced by this type of vector. They are always at right angles to each other and their sum is equal to the vector being replaced. Component Vector The most common triangle for the MCAT 3-4-5 5-12-13 scalar: Distance/time = vector: displacement/time= speedVelocity This vector is defined as the rate of change in velocity either in magnitude or direction. Change in velocity/time acceleration uniformly accelerated motion is motion with constant acceleration. What are the three uniformly accelerated motion? x=x0+vot+(1/2)at2v=vo+atv2=vo2+2ax what is the equation for average veolcity? vavg=(v+vo)/2 The peak height for the projectile formula vosin(teta)=square root(2gh) A large one of these increases air resistance because it allows for more collisions with air molecules surface area This is created when projectile collides with air molecules. It is a type of friction that is affected by surface area, shape, and velocity. Mass doesn't change it but it can alter the path of the projectile. Air resistance formula for speed v=d/t d=distancet=timev=speed formula for velocity velocity = displacement/time formula for acceleration acceleration=change in velocity/time another formula with constant acceleration v= square root(2gh) what is the value of g? g= 10m/s2 AuthorRDURU1 ID262705 Card Setphysics lecture 1 Descriptionbasic physics Updated2014-02-25T17:01:42Z Show Answers