Presentation is loading. Please wait.

Presentation is loading. Please wait.

Science Notes: Stnd 03 Date Standard 03: 8.PS2.3 Kinematics

Similar presentations


Presentation on theme: "Science Notes: Stnd 03 Date Standard 03: 8.PS2.3 Kinematics"— Presentation transcript:

1 Science Notes: Stnd 03 Date Standard 03: 8.PS2.3 Kinematics Create a demonstration of an object in motion that describes the position, force, and direction of the object. Science and Engineering Practice(s) Plan & Carry Out Investigations, Develop and Use Models, Obtain and communicate information, Analyze & Interpret Data, Construct Explanations, Argue from Evidence Crosscutting Concepts Cause and Effect, Stability and Change I Can Statement ...I can create a model of an object in motion and explain the vector quantities such as position, force and direction.

2 Scalar and Vector Quantities
A scalar quantity (scalar) is a one dimensional measurement. It only measures magnitude & is represented by a single number. Example: length of a book is 32 centimeters. Example: temperature of a cup of water is 20 degrees Celsius. Example: mass of a bowling ball is 5 kilograms. A vector quantity (vectors) requires more than one measurement. It includes magnitude and direction. Examples: Position, velocity, acceleration, momentum, displacement, and force(s) are vectors. Example: Displacement includes distance and direction. Example: Velocity includes speed and direction. Link (1:24): Vector and Scalar Quantities Describe ways that we use scalar and vector measurements.

3 Vector Quantities Vectors include magnitude and direction.
Magnitude: the meaning of magnitude is 'size' or 'quantity’ Example: Speed of 60 MPH...60 is the magnitude Look at the two red circles. Circle A has greater magnitude than circle B. Magnitude is the quantity or amount.

4 Direction Direction: the azimuth/bearing along which an object is moving. Examples: left, right, up, down, 10 degrees, 35 degrees, etc. How to determine direction: (use a compass), your direction of travel is the azimuth/bearing as revealed by the degree markings.

5 Vector Quantities Position: a place where an object is located.
Link (4:42): What is Position in Physics? Velocity: is the rate of change of an object’s position with respect to a frame of reference and is a function of time. (how fast an object is moving in a given direction.) Link (2:17): Speed and Velocity in Physics Acceleration: rate of change of an object’s velocity. Link (6:21): What is Acceleration? Momentum: mass in motion Link (1:25): What is Momentum? Displacement: overall change in position Link (2:41): Distance and Displacement Force: interaction that causes movement or change in shape Link (2:41): What are Forces-Physics Tutorial

6 Positive and Negative Motion
Velocity: is the rate of change of an object’s position with respect to a frame of reference and is a function of time. (how fast an object is moving in a given direction.) Example: A car is traveling 70 MPH west on Interstate 24 Positive Velocity: object heading in one direction from a given point. Negative Velocity: same object heading in reverse direction back towards the given point. Acceleration: rate of change of an object’s velocity. Example: Car’s speed is increasing or decreasing as it travels West on Interstate-24 Positive Acceleration: example -object is speeding up. Negative Acceleration: example -object slowing down.

7 Free Body Diagram (A.K.A. Force Diagram) Jet Airplane
Any horizontal motion? Any vertical motion? 400 N 600 N 300 N 300 N 1200 N 600 N 200 N front of plane Jet Airplane Examine Four factors that effect the motion of this object. Gravity, Thrust, Lift, and Wind Resistance (WR)

8 Force Link (2:34): Force and Net Force
Force: In simple terms, force is pushing or pulling on an object. unit of measure is Newtons. Net Force: the total amount of force acting on an object. Add them if they are pushing/pulling in the same direction. Subtract them if they are pushing/pulling in opposite directions. Opposite Directions: Subtract Net Force: = 10N Opposite Directions: Subtract Net Force: = Zero N Same Direction: Add Net Force: = 26N Link (2:34): Force and Net Force

9 Representing Motion in Graphs
Position vs. Time Graphs No Motion (object is not moving, object is stationary) Link: Interactive Graph-No Motion

10 Representing Motion in Graphs
Position vs. Time Graphs Constant Motion (object is moving at a constant velocity) Link: Interactive Graph-Constant Motion

11 Representing Motion in Graphs
Position vs. Time Graphs Acceleration-Positive Velocity (object is moving with increasing velocity) Link: Interactive Graph-Acceleration

12 Representing Motion in Graphs
Once you learn interpret motion graphs, you can tell at a glance if the object in question was moving toward you, away from you, speeding up slowing down, or moving at constant speed.


Download ppt "Science Notes: Stnd 03 Date Standard 03: 8.PS2.3 Kinematics"

Similar presentations


Ads by Google