Physics 11 Advanced Mr. Jean April 11th, 2012.

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Presentation transcript:

Physics 11 Advanced Mr. Jean April 11th, 2012

The plan: Video clip of the day Quiz reminder & topics Newton’s Third Law applications 2d applied forces

Quiz Info: Date: April 16th, 2012 Time: Period #1 Show up early.

Quiz Chapter #4: Chapter #4: Inertia Weight Accelerations due to gravity Surface Friction Including using coefficient tables Static Friction Kinetic Friction Free Body Diagrams With & Without motion

Quiz Chapter #5: Chapter #5: Newton’s first Law - Inertia Newton’s second Law – F = ma Newton’s third Law Dynamics and Kinematics together woohoo Applying Constant Acceleration Models Determining net forces Inclined Planes With & without 2d applied force Free Body Diagrams

Format: Multiple Choice True & False Short & Long Answer 15 points Force diagrams Friction Combining dynamics & kinematics 2d applied forces

Coefficients of Frictions:

Kinetic Friction vs. Static Friction:

Coefficient Table:

Newton’s Third Law:

Static Friction vs. Kinetic Friction:

Inclined Plane Intro:

Situation: Emma is standing on an icy hill. Brooklyn gives Emma a small push down the hill. Emma slides down the hill.

Inclined Planes Force Diagrams: Step #1: Draw the coordinate system with the x-axis parallel to the ramp. Step #2: Let the direction pointed downwards be in the positive direction.

Step #3: Step #4: Break the diagram into it’s components. Fg = Force of gravity perpendicular to inclined plane. Fg = Force of gravity parallel to inclined plane. Step #4: The force of gravity will remain the force of gravity regardless of what we do to the situation, thus we can solve for the component of the normal force.

Force Diagram with components:

Tomorrow’s class: Detailed example of inclined planes Discussion about components of forces… Ie: How do you know which trigonometric equation to use when you change the coordinate system?

To do: P. 208 #25 #36 P. 213 #35