Physics 151 Week 4 Day 3 Topics Motion Diagrams Motion Graphs

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The four kinematic equations which describe an object's motion are:

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Presentation transcript:

Physics 151 Week 4 Day 3 Topics Motion Diagrams Motion Graphs Area under a curve (velocity to position) Constant acceleration equations

A x0 x1 V0x v1x ax Motion Diagrams (a.k.a. Motion Maps) The motion diagrams below show an initial point 0 and a final point 1. A pictorial model would define five symbols, x0 and x1 (or y0 and y1), v0x and v1x, and ax. Determine whether each of these quantities is positive, negative, or zero. place either +, --, or 0 in each cell of the table below. These are motion diagrams with axes. For this problem, you have to figure out which positions, velocity components and acceleration components are negative (--), positive (+), or zero for one motion interval. "0" on the axis indicates the origin and the "x" or "y" indicates the positive x or y direction respectvely. The "0" on the motion diagram represents the initial position of the object for the motion interval shown. The "1" on the motion diagram represents the final position of the object for the motion interval shown. A x0 x1 V0x v1x ax Answer: C Slide 2-4

Motion Maps for + / - vx and ax Answer: C Slide 2-4

Motion Graph Demonstrations Answer: C Slide 2-4

Velocity Graph => Acceleration Graph Answer: C Slide 2-4

x = area under vx vs. t graph Answer: C Slide 2-4

vx = area under ax vs. t graph Answer: C Slide 2-4

General Motion Model Graph Relationships Answer: C Slide 2-4

Constant Acceleration Equations Answer: C Area 2 Area 1 Slide 2-4