## UARM Objectives

We have been working through the Uniform Accelerated Rectilinear Motion (UARM) unit. Here are the big picture questions that I would like you to keep in mind while we’re working through this unit:

• What automobile controls can cause acceleration?
• What is the difference between the common use of the term acceleration and the physics use of the term?
• Suppose that an elephant and a feather are dropped off a very tall building from the same height at the same time. If air resistance is somehow eliminated, which object – the elephant or the feather – will hit the ground first?
• What are the different factors that determine the range of a projectile?

In addition, here is a summary of what you are responsible for in this unit:

 # Objective Must-do Activities Videos 1 Determine the average velocity of an object UARM test #1 Intro to Acceleration, Graphing Relationships 2 Determine the instantaneous velocity of an object UARM test #1 Intro to Acceleration, Graphing Relationships 3 Draw and interpret diagrams to represent the motion of an object moving with a constant acceleration Moving Man worksheet, Free Fall lab, UARM test #1 Graphing Relationships 4 Apply a = Δv/Δt, Δd = v1Δt + ½aΔt and v22  = v1 2  + 2aΔd to solve UARM problems UARM worksheet, Free Fall lab, UARM test #1 UARM, Free Fall 5 Explain the motion of a free-falling body Free Fall lab, UARM test #1 Free Fall 6 Explain the motion of a projectile Golf Range Assignment, UARM test #2 Graphing Relationships, Projectile Motion 7 Determine the position, displacement, or instantaneous velocity of a projectile at a given time Projectile Worksheet, UARM test #2 Projectile Motion

## Moving Man simulation

We will be using this simulation in class this week:

 Click to Run

## #SciStuChat – Surviving a year in space

Every month, there is a #SciStuChat Twitter chat for students all over North America to communicate with scientists on a different theme. In October, the theme is “Surviving a year in space” and the chat will be Thursday (October 8) from 9-10PM:

Astronaut Scott Kelly is spending a year in space on the International Space Station, and his Russian counterpart cosmonaut Mikhail Kornienko is doing the same thing. On Sept 15 they reached the halfway point of the#yearinspace. The major purpose of the #yearinspace is to learn the demands the human body requires to make the trip to Mars.

You can find more information here. Since some of you have not participated in a Twitter chat before, I put a few tips together. This is an optional activity, but I recommend it. You will have the opportunity to ask real scientists questions!

• If you want to see tweets during the chat
2. Under the #SciStuChat banner, select “Live”
3. As new tweets come in, you will be notified at the top of the page

If you want to participate