PHYS 104 1st Edition Lecture 3 Outline of Last Lecture I. Measurement and Unita. SI unitsII. Mathematic Relationshipsa. Log rulesb. Power rulesOutline of Current Lecture III. Guest Lecture Tyson Henricka. Flight forcesIV. Forcesa. Push and Pullb. Vectorsc. Gravitational Forced. Normal ForceV. Newtona. First lawb. Third lawCurrent Lecture- Guest Lectureo Forces intersect biologyo Flight forces in birds Pectoralis muscle force Muscle force vs. speed Force or power could limit flighto Experiment Birds in wind tunnelso Hummingbird Behavior Groups Defenders of the food Chased away from others’ food Free – control- Forceso Push and pull of two objectso Vectors Unit = NewtonThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Magnitude Direction Scalar quantities have no directiono Gravitational Force “W” Weigh force exerted by earth on the objecto Normal Force “N” Always perpendicular to the contacted surface- Newtono First Law If an object is at rest, the sum of forces = 0 equilibriumo Third Law Action = reaction Forces come in pairs A acts on B, B acts on
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