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# Chapter 2 Notes 80218 - PHYS 1220 - 001

Clemson

GPA 3.2

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This 2 page Class Notes was uploaded by Jacob Edwards on Thursday January 28, 2016. The Class Notes belongs to 80218 - PHYS 1220 - 001 at Clemson University taught by Lih-sin The in Winter 2016. Since its upload, it has received 15 views. For similar materials see Physics with Calculus I in Physics 2 at Clemson University.

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Date Created: 01/28/16

Chapter 2 PHYS 1220 Kinematics-The careful description of motion that is independent of its cause Dynamics- Involves the cause of motion One-Dimensional Kinematics- motion can be rotational, vibrational, or translation Rotational motion- A spinning motion Vibrational Energy- Back and forth motion Translation Energy- Moving from point a to point b o A translating object can be shown as a particle Most kinematics are shown with vectors o A vector has a magnitude and a direction o A scalar is a quantity that has no direction and is only magnitude Kinematics can be expressed by using a motion diagram o A motion diagram is an illustration that will depict an object at different time intervals o These diagrams are often showed with planets Vectors- The unit vectors compose of i, j, and k o i is the x direction o j is the y direction o k is the z direction The Magnitude of a vector Q is asked for by lQl The factor that appears in front of a vector is called a scalar Motion- Position is shown in position vs time graphs The x-axis is typically time and the y coordinate is distance The derivative of these graphs or functions is the velocity Displacement is the change in position (This would be the change from the initial position) The distance traveled is the length of the whole path that is covered Average velocity is equal to the distance in the x direction divided by the change in time xfinal initial tfinal initial How fast an object moves without regard to direction is average speed distance Average Speed= ∆time Instantaneous velocity is found by taking the derivative of the position, it can be positive or negative Instantaneous speed is the magnitude of initial velocity The average acceleration is the change of velocity over a time interval Δv Δt The instantaneous acceleration is the derivative of velocity Negative acceleration is deceleration Five Kinematic Equations http://gradeelevenphysics.weebly.com/uploads/1/6/4/7/16477380/2057736.png?535 Free Fall Acceleration- Free fall is when an object is under the influence of gravity Gravity is equal to 9.8 m/s 2

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