phys1441-spring08-020408-post

# phys1441-spring08-020408-post - PHYS 1441 Section 002...

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Monday, Feb. 4, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 1 PHYS 1441 – Section 002 Lecture #6 Monday, Feb. 4, 2008 Dr. Jae hoon Yu Examples for 1-Dim kinematic equations Free Fall Motion in Two Dimensions Maximum ranges and heights Today’s homework is homework #3, due 9pm, Monday, Feb. 11!!

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Monday, Feb. 4, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 2 Announcements • E-mail distribution list – Test message sent out last Thursday – 24 of you confirmed the receipt – If you did not get the message, you could be missing important information related to class – Please make sure that you are on the distribution list • Quiz Wednesday, Feb 6, early in the class – Covers from CH1 – what we learn today
Monday, Feb. 4, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 3 Reminder: Special Problems for Extra Credit • Derive the quadratic equation for yx 2 -zx+v=0 Î 5 points • Derive the kinematic equation from first principles and the known kinematic equations Î 10 points •Y o u m u s t show your work in detail to obtain the full credit • Due next Wednesday, Feb. 6 ( ) 22 00 2 vv a x x =+

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Monday, Feb. 4, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 4 Kinematic Equations of Motion on a Straight Line Under Constant Acceleration () 0 vt v a t + = 2 00 1 2 x xv t a t + =+ 11 22 x tv v t + −= = ( ) 2 2 2 vv a x x Velocity as a function of time Displacement as a function of velocities and time Displacement as a function of time, velocity, and acceleration Velocity as a function of Displacement and acceleration You may use different forms of Kinematic equations, depending on the information given to you in specific physical problems!!
Monday, Feb. 4, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 5 How do we solve a problem using a kinematic formula under constant acceleration? • Identify what information is given in the problem. – Initial and final velocity? – Acceleration? – Distance, initial position or final position? –T im e ? • Convert the units of all quantities to SI units to be consistent. • Identify what the problem wants • Identify which kinematic formula is appropriate and easiest to solve for what the problem wants.

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phys1441-spring08-020408-post - PHYS 1441 Section 002...

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