1) Today's physics lecture covered kinematics and dynamics, including constant acceleration equations and Newton's second law.
2) An example problem involved a tractor pulling a trailer with a total acceleration of 1.5 m/s^2, finding the horizontal force on the tractor from the ground is 1050 N.
3) Another example used a pulley system with two boxes to find the common acceleration of 2.45 m/s^2 and the time for the second box to hit the table is 0.81 seconds.
2. What’s Most Difficult Tension / setting up problem / vectors / free body diagrams. … which problems out of the book would be most beneficial to use for practice.. Knowing if we must memorize te equations . remembering to do the prefilghts / Staying awake. Trig!! SOH CAH TOA?? 6 years of information sort of nudged that out of my brain getting used to symbolic representations of equations
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8. Newton’s Second Law F=ma position and velocity depend on history Net Force determines acceleration
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Notas del editor
X = x_o + v_avg t V_avg = ½ (v_o+v_f)
V^2=v^2+2ax A = v@-v^2 / (2 x) = -30^2 / 300 = -3 V^2 = V^2 + 2 a (x) = 30^2 + 2 (-3)(75) = 21 m/s
![Kinematics + Dynamics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Physics 101: Lecture 04 Exam I neptune](https://image.slidesharecdn.com/lecture04-111229014225-phpapp02/85/Lecture04-1-320.jpg)
