New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

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

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Physics 101: week 2, 8/23

by: Kate Worley

Physics 101: week 2, 8/23 Physics 101

Kate Worley

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Notes from August 23 that cover inertia, position, speed, and velocity.
How Things Work
Kranti Gunthoti
Class Notes
25 ?




Popular in How Things Work

Popular in PHYSICS (PHY)

This 3 page Class Notes was uploaded by Kate Worley on Tuesday August 23, 2016. The Class Notes belongs to Physics 101 at University of Tennessee - Knoxville taught by Kranti Gunthoti in Fall 2016. Since its upload, it has received 101 views. For similar materials see How Things Work in PHYSICS (PHY) at University of Tennessee - Knoxville.


Reviews for Physics 101: week 2, 8/23


Report this Material


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: 08/23/16
Physics 101 Notes: 8/23  Skates o Riding a skateboard allows you to move freely, with ease and simplicity, without the constraints of friction o The skates support you vertically, because the ground supports the skates and the skates support you. But unlike shoes, the skates move freely back and forth o Skating is an example of the principle, Inertia: an object at rest tends to remain at rest, and object in motion tends to stay in motion.  Why does a stationary skater remain stationary? o An object at rest tends to stay at rest (inertia) o Question: “A rotary lawnmower spins its sharp blade rapidly over the lawn and cuts the tops off the grass. Would the blade still cut the grasses if they weren’t attached to the ground?  Yes, because even though it is not attached to the ground, it will stay in place because of inertia, allowing the blade to cut the grass.  Why does a moving skater tend to keep moving? o An object in motion tends to remain in motion (inertia) o Inertial objects: inertial objects move in a straight line with a steady pace. o Objects at rest are still at a steady pace of motion (steady pace is 0)  Newton’s First law of Motion o “An object that is free of external influences moves in a straight line and covers equal distances in equal times.” o Question: Which one of the following is moving according to Newton’s first law of motion? A. A skater moving straight toward a flagpole and speeding up B. A skater moving straight forward and slowing downC. A skater moving in a circle at a steady speed D. A skater who is experiencing zero force  Position o The measure of an object’s location in space o For position, you need:  Reference point  Distance from the reference point  Direction from the reference point o S.I unit of distance is meter o “Physical quantities like position have both amount and direction”  Vector quantities  Speed o Rate at which an object covers distance o S= d/t (distance divided by time) o Dividing the total distance travelled by the object, by the total time it travelled, will give you the speed, or velocity, at which the object is travelling o If you travel 60 miles in 2 hours, then you average speed is 30 miles per hour (60/2=30) o Based on the information given to you, you can reword the equation in different ways  If we know the car is travelling at 55 miles per hour and it travelled for 3 hours, you divide speed by time to get the distance (d=s/t). So you know the car travelled for 165 miles.  If you know the car travelled for 220 miles at 55 miles per hour, you divide the distance by the speed to get the time. (t=d/s). So you know the car travelled for 4 hours. o The units are always carried along the calculations and treated as algebraic quantities o Units are standard quantities such as seconds, meters, or miles o The most common units are those of the international system (SI), which contains meters, seconds, and kilograms  Velocity o The rate at which the position of an object changes o Velocity is a vector quantity (direction), speed is a scalar quantity (no direction) o Measured with distance/time (miles/hour) o Average velocity of an object: “the displacement of the object divided by the time at which the displacement occurred “ (v=Dx/Dt)=((x2-x1)/t2-t1)). The x’s are the starting and end points, t’s are the starting and end times. o A runner runs a mile around the track in 5 minutes. What is his average velocity? What is his average speed?  Velocity: the velocity is zero, because he did not cover any distance because his starting and ending points were the same  Speed: 1 mile/5 min  12 mi/ 60 minutes (1 hour)  12 miles per hour  In order to convert to miles per hour, you had to multiply 5 min by 12 to get to 60 minutes, or one hour. Because you did that, you also have to multiply 1 mile by 12, which leaves you with 12 miles per hour. o A car drives north for 35 minutes at 85 km/hour and stops for 15 minutes. He continues, traveling 130 km in 2 hours. What is the total distance? What is his average velocity?


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

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

Jim McGreen Ohio University

"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."

Allison Fischer University of Alabama

"I signed up to be an Elite Notetaker with 2 of my sorority sisters this semester. We just posted our notes weekly and were each making over $600 per month. I LOVE StudySoup!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund 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


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:

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

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.