### Create a StudySoup account

#### Be part of our community, it's free to join!

Already have a StudySoup account? Login here

# Physics Notes - Vectors , Circular Motion, Newton's 1st and 2nd Laws CLA PHY 14.003PRISM

Mercer

GPA 3.307

### View Full Document

## About this Document

## 83

## 1

1 review

## Popular in Intro Physics 1

## Popular in Department

This 5 page Class Notes was uploaded by Clairissa Cole on Wednesday February 3, 2016. The Class Notes belongs to CLA PHY 14.003PRISM at Mercer University taught by Dr. Chamaree de Silva in Winter 2016. Since its upload, it has received 83 views.

## Similar to CLA PHY 14.003PRISM at Mercer

## Reviews for Physics Notes - Vectors , Circular Motion, Newton's 1st and 2nd Laws

You're awesome! I'll be using your notes for sure moving forward :D

-*Kaela*

### What is Karma?

#### Karma is the currency of StudySoup.

#### You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 02/03/16

Physics Ch. 3 - Intro to Vectors Monday, January 18, 2016 7:09 PM • Scalars vs. Vectors Scalars : a number w/ units ex: speed, time, distance Vectors:a value with both magnitude & direction ex: displacement , velocity,acceleration • Componentsof a vector -> R Y ⁰ X Example Problem : Find the x and y componentsof a position vector r-> of magnitude r = 75m, if its angle relative to the x- axis (a) 35.0 degrees (b) 65.0 degrees. Manipulating Vectors Friday, January 22, 20165:00 PM Multiplying Vectors by a Scalar -Suppose Vector A has a magnitude of 2 so, 3A has a magnitude of 6 2A 3A Unit Vector -has a magnitude of exactly 1 *think unit circle* -can point in any direction 1 Given a unit vector u, it's arrowhead must lie on the unit circle -Vector Notations : ˰ x-component: ˰ y- component: ˰ ˰ Ex. Vector b = -16m Vector Addition -You can add vectors in two ways : Graphically or Algebraically A + B = C [Vector C is the resultant vector ] -When adding vectorsgraphically, you align them tip-to-tail Ex. Vector A is 5.5cm points along positivex-axis. Vector B is 7.5cm and points 150⁰ from positive x-axis in the counter clockwise direction. -How to solve? 1. Solve for x & y componentsof each vector 2. Add x components, add y components 3. Draw resultant vector componentsthen solve for hypotenuse and angle. Newton's Laws of Motion Monday, February 1, 2016 7:22 PM ▪ Forces - push or pull on an object - Ex: if you have a book resting on a table Normal Force (upward by table) friction (weight (w=mg)) -Force is a vector: it has magnitude and direction (push or pull) • Net Forces - vector sum of all the individual forces. -Ex: Net Force = F 1 + F2 1st Law : *If an object is at rest, it will stay at rest as long as there is no net force acting on it. *An object moving at constant velocity, continues to move with the same speed in the same direction as long as there is no net force acting on it. => Also known as the Law of Inertia : Object won't change motion unless forced to do so. Object at rest, stays at rest Object already moving with constant velocity won't change speed or direction. • 2nd Law : * *If you have an unbalanced force(netforce does not = 0) ; you have acceleration (not constant velocity) ○ Force is measured in Newtons (N) => Ex: Suppose your mass is 81 kg. Find your weight on the Earth and on the Moon. Circular Motion Monday, February 1, 2016 5:02 PM The velocity vector is tangential to the circular path. magnitude(speed) -assume constant speed vectors are the same length. Velocity Vector has : direction (changes with time) Since acceleration is -we can represent this graphically by using vector subtraction(addition) always points to the center ; it is centripetal acceleration ( center - seeking in Latin) An object moving in a circular motion has: - Constant Speed - Changing velocity (because the direction is always changing) - Acceleration (inwards toward center of the curve) *allows object to change direction* A particle is in uniform circular motion if it travels around a circular path at a constant speed. magnitude Acceleration has : direction : always toward canter How to calculate how long it would take for an object to travel one period of revolution ?

### BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.

### You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

## Why people love StudySoup

#### "Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

#### "I used the money I made selling my notes & study guides to pay for spring break in Olympia, Washington...which was Sweet!"

#### "I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

#### "Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

### Refund Policy

#### STUDYSOUP CANCELLATION POLICY

All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email support@studysoup.com

#### STUDYSOUP REFUND POLICY

StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here: support@studysoup.com

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to support@studysoup.com

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.