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by: Jay Ko

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# PHYS 101 - Week 2 lecture notes Hafner/Padley 8/29 - 8/31/2016 PHYS 101

Marketplace > Rice University > Physics > PHYS 101 > PHYS 101 Week 2 lecture notes Hafner Padley 8 29 8 31 2016
Jay Ko
Rice University
GPA 3.8

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Week two lecture notes from PHYS 101 Mechanics 8/29 - 8/31/2016
COURSE
MECHANICS (WITH LAB)
PROF.
Dr. Jason Hafner
TYPE
Class Notes
PAGES
6
WORDS
CONCEPTS
kinematic, freefall, free, Fall, Math, Calculus, motion, falling
KARMA
25 ?

## Popular in Physics

This 6 page Class Notes was uploaded by Jay Ko on Sunday September 4, 2016. The Class Notes belongs to PHYS 101 at Rice University taught by Dr. Jason Hafner in Fall 2016. Since its upload, it has received 11 views. For similar materials see MECHANICS (WITH LAB) in Physics at Rice University.

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Date Created: 09/04/16
PHYS 101 – Mechanics – Dr. Jason Hafner & Dr. Bria n Padley – Week One (8.29/8.31 ) 8.29.16 • Complicated position vs. t plot o Recall that § Allow t to get very small § Instantaneous velocity: § Instantaneous speed: • Magnitude of Vx • Ex. 1-D Constant Velocity, Vi o Velocity at any time t=constant velocity: o Recall that: § Velocity is the rate of change of displacement with respect to time § Acceleration is the rate of change of velocity with respect to time § Average Acceleration: • Ex. Ball rolling down an incline, assuming positive x is down the incline and zero at the top o Plot x vs. t, v vs.t, a vs. t. PHYS 101 – Mechanics – Dr. Jason Hafner & Dr. Bria n Padley – Week One (8.29/8.31 ) o § Parabolic for constant acceleration o § average acceleration = (delta)x/(delta)t o § Constant acceleration • Ex. John Strapp o Accelerated from rest to 632mph in 5 seconds. PHYS 101 – Mechanics – Dr. Jason Hafner & Dr. Bria n Padley – Week One (8.29/8.31 ) § § o Deceleration § Given: From 282.5m/s to 0m/s in 1.4s. § • Ex. Roll ball up an incline (then it rolls back down) o § At the peak, slope is 0 and thus velocity is 0. § Left side, positive slope and decreasing (velocity is positive but getting smaller) § Right side, negative slope and increasing (velocity is negative and getting more negative) o § Area under the curve = (delta)x for (delta)t PHYS 101 – Mechanics – Dr. Jason Hafner & Dr. Bria n Padley – Week One (8.29/8.31 ) o § Constant negative acceleration • Instantaneous Acceleration o o 2 • Ex. x(t)=a+bt+ct o Let’s say x in m = m, m/s, m/s o o o • Simple Kinematic Equations o o o o PHYS 101 – Mechanics – Dr. Jason Hafner & Dr. Bria n Padley – Week One (8.29/8.31 ) 8.31.16 • Freely Falling Objects o Close to surface gravitational acceleration g=9.8m/s and is nearly constant (ignoring air resistance) • Ex. Tossing ball into the air o o o 2 § g=-9.8m/s rd • Ex. Imagine your friend on the 3 flood of a building, and you toss a drink up to him from below, straight up. Find the minimum velocity when leaving hand. PHYS 101 – Mechanics – Dr. Jason Hafner & Dr. Bria n Padley – Week One (8.29/8.31 ) • • • •

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