lecture06 - Physics 101 Lecture 6 Pg 1 Physics 101 Lecture...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Physics 101: Lecture 6, Pg 1 Physics 101: Lecture 06 Today’s lecture will cover Chapter 4 Exam I Physics 101: Lecture 6, Pg 2 • Newton’s Laws of motion: Σ F=ma •Kinematics: x = x + v t + ½ a t 2 •Dynamics •Today we work in 2 Dimensions! Physics 101: Lecture 6, Pg 3 X and Y are INDEPENDENT! Break 2-D problem into two 1-D problems y x Physics 101: Lecture 6, Pg 4 Position, Velocity and Acceleration are Vectors! x and y directions are INDEPENDENT! x direction y direction Physics 101: Lecture 6, Pg 5 5 m/s 3 m/s A ball is rolling on a horizontal surface at 5 m/s. It then rolls up a ramp at a 25 degree angle. After 0.5 seconds, the ball has slowed to 3 m/s. What is the magnitude of the change in velocity? A) 0 m/s B) 2 m/s C) 2.6 m/s D) 3 m/s E) 5 m/s y x x-direction v ix = 5 m/s v fx = 3 m/s cos(25) Δ v x = 3cos(25)–5 =-2.28 m/s y-direction v iy = 0 m/s v fy = 3 m/s sin(25) Δ v y = 3sin(25)=+1.27 m/s Physics 101: Lecture 6, Pg 6 5 m/s 3 m/s A ball is rolling on a horizontal surface at 5 m/s. It then rolls up a ramp at a 25 degree angle. After 0.5 seconds, the ball has slowed to 3 m/s. What is the average acceleration? y x x-direction y-direction Physics 101: Lecture 6, Pg 7 x = x + v 0x t + 1/2 a x t 2 v x = v 0x + a x t v x 2 = v 0x 2 + 2a x Δ x y = y + v 0y t + 1/2 a y t 2 v y = v 0y + a y t v y 2 = v 0y 2 + 2a y Δ y x and y motions are independent !...
View Full Document

This note was uploaded on 02/05/2012 for the course PHYS 101 taught by Professor Ha during the Spring '11 term at University of Illinois at Urbana–Champaign.

Page1 / 18

lecture06 - Physics 101 Lecture 6 Pg 1 Physics 101 Lecture...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online