PHYSICS 50: Lecture 2.1 RICHARD CRAIG. Plan for the day Motion Definitions Position, Velocity and Acceleration Graphs Equations Free Fall Examples Baseball.

Slides:

Advertisements

Similar presentations

PHYSICS 50: Lecture 7-1 RICHARD CRAIG. Homework #6 Read Chapter 7 Exercises and Problems: 7.5, 7.14, 7.29,7.38, 7.46, 7.55 Due Thursday, 3/13.

Advertisements

Free Fall Chapter 2 Section 3. Free Fall  Free Fall – An object in free fall falls at a constant acceleration towards the surface of a planet neglecting.

Gravity and free fall.

ACCELLERATION -Acceleration shows how fast velocity changes - Acceleration is the “velocity of velocity”

Physics: Concepts and Connections, 4 th ed., Art Hobson Chapter 3 – Motion.

Free Fall Chapter 2 Section 3.

Physics 203 – College Physics I Department of Physics – The Citadel Physics 203 College Physics I Fall 2012 S. A. Yost Chapter 2 Motion in 1 Dimension.

If you drop an object in the absence of air resistance, it accelerates downward at 9.8 m/s 2. If instead you throw it downward, its downward acceleration.

Chapter 2 Lecture 3: Motion in One Dimension: Part II.

You will never be confident that you know what you’re doing. You must try in spite of the fact that you don’t know what you’re doing. You will fail. You.

©1997 by Eric Mazur Published by Pearson Prentice Hall Upper Saddle River, NJ ISBN No portion of the file may be distributed, transmitted.

A. Position, Distance, Displacement 1. Position along a number line Distance is total length traveled 3. Displacement x = x f - x i B. Average.

Chapter 2, Part 2 September 5, 2005 (Happy Labor Day)

1. Position along a number line Distance is total length traveled 3. Displacement x = x f - x i Ch2-1 Position, Distance, and Displacement Chapter.

Physics 151 Week 5 Day 1 Topics Area under a velocity graph

Free Fall Lecture 3.

PHYS 201 Chapter 2: Kinematics in 1-D Distance Displacement Speed

©2008 by W.H. Freeman and Company Chapter 2 Motionin One Dimension.

Analysis of a position vs. time graph Analysis of a velocity vs. time graph What can be determined from a position vs. time graph? What can be determined.

Uniformly Accelerated Motion

Acceleration (a vector quantity) is defined as the rate of change of velocity. It has units of m/s 2 Acceleration can be positive, negative, or zero. An.

Chapter 3 Linear Motion. 5.DESCRIPTION OF MOTION Speed Velocity Acceleration.

Acceleration Chapter 3 Section 1.

Free Fall Motion Notes Day 4.

Motion. Some Motion Terms Distance & Displacement Velocity & Speed Acceleration Uniform motion Scalar.vs. vector.

Honors Physics Chapter 3

Classical Mechanics Kinematics – how objects move –Translational motion –Rotational motion –Vibrational motion Dynamics – Forces and why objects move as.

Kinematics in One Dimension We will focus today on problem- solving. Note: some problems are hard, some are not so hard. Part of the learning is recognizing.

 Jim is walking down the street with a speed of 3 m/s. An angry mob starts chasing him so he accelerates to 6 m/s in 2 seconds. What is Jim’s acceleration?

CHAPTER 3 ACCELERATION AND FREE FALL. ACCELERATION.

Do Now A motorbike accelerates at 2.6 ms -2 for 4 seconds until it reaches the new speed of 25 ms -1. a)What distance is covered along the course of acceleration?

Acceleration. 5.The motion of a particle along a straight line is depicted in this graph. Assessment V (m/s) t (s) What is the acceleration of the particle.

Calculating Acceleration

Chapter 2 Homework #1 Questions: 2,3,4,5,6,9,16, 17 Problems: 1,2,5,6,9,8,13, 17, 20,22,23,26, 27,28 Due Sept 29 Quiz on Section 1-6 on Sept 29.

Chapter 2: Motion in One Dimension Introduction  The study of motion and of physical concept such as force and mass is called dynamics.  The part of.

Free Fall All objects moving under the influence of only gravity are said to be in free fall All objects moving under the influence of only gravity are.

Physics 1D03 - Lecture 21 Kinematics in One Dimension Displacement, velocity, acceleration Graphs A special case: constant acceleration Bodies in free.

Chapter 3 Motion in a line (linear motion). Motion Vocabulary A cat moves a distance of 10 meters (how far?) in 5 seconds. What information do you KNOW.

Physics 151 Week 5 Day 2 Topics –Motion with constant acceleration –Motion Diagrams –Motion Graphs –Area under a curve –Acceleration to velocity –Velocity.

Chapter 3 Accelerated Motion. Introduction In this chapter we will examine acceleration and define it in terms of velocity. We will also solve problems.

Chapter 2 Lecture 4: Motion in One Dimension: Part II HW1 (problems): 1.18, 1.27, 2.11, 2.17, 2.21, 2.35, 2.51, 2.67 Due Thursday, Feb. 11.

Motion (Chapter 2) Student Learning Objectives Compare and contrast terms used to describe motion Analyze circular and parabolic motion.

ACCELERATION 1. Acceleration: is the rate at which the velocity of an object changes relative to time 2.

Falling Objects 2.3 pp Mr. Richter. Agenda  Warm-Up  Review HW p. 58 #4-6  Questions about the Lab?  Intro to Free Fall  Notes:  Free Fall.

Chapter 2 Homework #1 Questions: 4,6,7,9,10,13,18, 19 Problems: 1,2,3,6-9,13,14,19, 20,22,23,24 Due Sept 22 Quiz on Section 1-6 on Sept 22.

PHYSICS 50: Lecture 3.1 RICHARD CRAIG. Plan for the day Chapter 3 Free fall in two dimensions Horizontal rifle shot Discussion Baseball hit Relative Velocity.

You and your dog go for a walk to the park. On the way, your dog takes many side trips to chase squirrels or examine fire hydrants. When you arrive at.

2.7 Freely Falling Bodies In the absence of air resistance, all bodies at the same location above the earth fall vertically with the same acceleration.

Linear Motion. Displacement The change in position for a given time interval.

If you missed the first lecture. . .

Acceleration due to Gravity

The two measurements necessary for calculating average speed are…

Freefall and vertical motion

9.2 Calculating Acceleration

9.2 Calculating Acceleration

9.2 Calculating Acceleration

9.2 Calculating Acceleration

Motion in a Straight Line

1-D Kinematics Review.

9.2 Calculating Acceleration

The slope of a velocity-time graph is ______________________.

Calculating Acceleration

Free Fall: How Fast and How Far

stays there for a second, and then runs back to P

9.2 Calculating Acceleration

Chapter 2 Motion in One Dimension

Velocity and Acceleration

2.7 Freely Falling Bodies In the absence of air resistance, all bodies at the same location above the earth fall vertically with the same acceleration.

Calculating Acceleration

Presentation transcript:

PHYSICS 50: Lecture 2.1 RICHARD CRAIG

Plan for the day Motion Definitions Position, Velocity and Acceleration Graphs Equations Free Fall Examples Baseball Quiz: GG Bridge Sprinter Concept Questions

Homework #1 Read Chapter 1(all), Chapter 2 (not 2.6) Exercises and Problems:1.3, 1.49, 1.99, 2.14, 2.39, 2.59 Due Thursday, 1/31

Velocity (1-D) Average Velocity (1-D) Instantaneous Velocity (1-D)

Acceleration (1-D) Average Acceleration (1-D) Instantaneous Acceleration (1-D)

Example:Velocity Graph a)Where is the acceleration largest b)What is the acceleration between 15s and 25s?

Equations of Motion:Constant Acceleration

The Car and the Cop

Car and the Cop What is the acceleration of the car? When do the car and the cop have same speed? When does the car catch the cop? Where does the cop catch the car? What would the answer be if the car had a 5s head start?

Equations of motion:Free Fall Gravity near the surface of the earth acts as a constant acceleration The value of “g” (the acceleration due to gravity) is about 9.8m/s 2 “g” points down (- if your coordinate system has up as +)

Example: Throw a ball in the air If you throw a baseball straight up with a speed of 30m/s (about 65 MPH) and ignore air resistance: a)How high will it go? b)At it’s highest point what is it’s velocity? c)At it’s highest point what is it’s acceleration? d)Does it matter how heavy the ball is?

Example: Sprinter Example where acceleration is not constant In a 100m dash a runner accelerates (assume constant acceleration) for the first 3.0 sec then runs at a constant speed for the next 7.0 sec to the finish a)What is his acceleration during the first period? b)What is his speed during the second period?

If you drop an object in the absence of air resistance, it accelerates downward at 9.8 m/s 2. If instead you throw it downward, its downward acceleration after release is 1. less than 9.8 m/s m/s more than 9.8 m/s 2. Concept Question

The graph shows position as a function of time for two trains running on parallel tracks. Which is true? 1. At time t B, both trains have the same velocity. 2. Both trains speed up all the time. 3. Both trains have the same velocity at some time before t B. 4. Somewhere on the graph, both trains have the same acceleration.

You are throwing a ball straight up in the air. At the highest point, the ball’s 1. velocity and acceleration are zero. 2. velocity is nonzero but its acceleration is zero. 3. acceleration is nonzero, but its velocity is zero. 4. velocity and acceleration are both nonzero. Concept Test