Steph_and_hella


 * Linear Kinematics **
 * Stephanie Wang and Hella Talas**

Materials:
Things I need from Ms. Burns:
 * 1) 2 rolling scooters
 * 2)  2 ramps
 * 3) 1 CMV
 * 4) 1 dynamics cart
 * 5) masking tape
 * 6) 3 hole punchers

Things that I will bring
 * 1) Trifold poster
 * 2) Army men
 * 3) a tennis ball
 * 4) material to make parachutes
 * 5) string, cut up
 * 6) tape
 * 7) paper, cut up
 * 8) cloth, cup up
 * 9) <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">tissues
 * 10) <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">straws, cut up
 * 11) <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">plastic bags, cut up
 * 12) <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">2 handheld fans
 * 13) <span style="background-color: transparent; color: #000000; font-family: Arial; font-size: 15px; text-decoration: none; vertical-align: baseline;">2 marbles
 * Activities **
 * __ At rest vs In motion __**
 * ** We will ask 2 kids to sit on scooters. One kid will be at rest on the scooter, and we will push the other kid around to demonstrate the difference between at rest and in motion. **
 * __ Constant speed vs Acceleration __**
 * ** We will push a dynamics cart down a ramp and run a CMV down a ramp to show the difference between constant speed and acceleration. **
 * __ Acceleration __**
 * ** We will mark a starting line and a finish line on the floor with masking tape. Then, we will give 2 cars handheld fans. They will use these fans to propel glass marbles forward, and race them. **
 * __ Acceleration due to Gravity __**
 * ** We will make parachutes with paper, paper towels, tissue paper, string, and tape. We will attach these to plastic army men and drop them to see who made the best and most effect parachute. **


 * Script **

STEPHANIE: Hi everyone, I’m Stephanie.

HELLA: And my name is Hella.

STEPHANIE: We are here today to teach you about the fun and exciting world of linear kinematics!

HELLA: Now, that may seem complicated, but it’s really simple.

STEPHANIE: Kinematics is just the study of how objects move. Linear kinematics is learning about objects that only move in a straight line-- front to back, left to right, or up and down.

(while saying the last part, demonstrate with hands and a ball) Does anyone have any examples of linear kinematics?

KIDS: example example blah blah

HELLA: Some other examples of linear kinematics are when you drop a ball off a roof or when a car drives down a straight road.

STEPHANIE: We have some different activities planned so you guys can understand everything about linear kinematics!

HELLA: First, we need two volunteers to help us out! (pick 2 volunteers)

STEPHANIE: Can each of you please sit on a scooter?

(they sit, and we begin to push one of the kids)

HELLA: Now, what is the difference between _(Kid A’s name) and (Kid B’s Name)?

KIDS: One is moving, while one is staying still.

STEPHANIE: That is correct. You can either be in motion or at rest. If you’re at rest, you’re not moving, and if you’re in motion, that means you are moving.

HELLA: Now, who wants to be in motion on the scooters?

KIDS: ME ME ME ME ME ME

(we push the kids around on the scooters)

STEPHANIE: Now, has everyone had a turn?

KIDS: yes

HELLA: Let’s move on to our next activity!

STEPHANIE: Now, we have different kinds of motion. Look, can anyone tell me the difference between these two cars? (turn on a CMV, put it on ramp, and make a car accelerate by letting it run down a ramp)

Kids: blah blah blah

HELLA: This car (points at CMV) is not going any faster or slower. It is going at the same rate all the time. So, we say that it is going at constant speed. Constant means that it isn’t changing, and speed refers to how fast it is going. The faster a car is going, the more distance it covers in a short amount of time. If a car is going slowly, it means that it takes a long time for it to travel a short distance. So, this car that is going at constant speed is travelling at the same rate at all times.

STEPHANIE: So, now we know that there are different kinds of motion. An object can be at rest, going at constant speed, increasing speed, or decreasing speed. Does anyone know the fancy term we use to describe objects that are have speed getting bigger or getting smaller?

KIDS:

STEPHANIE: A lot of times, the word acceleration is only used to describe objects that are speeding up. But, if something is slowing down, it is also accelerating. The word actually applies to all objects that are changing speed.

HELLA: So, what are some examples of acceleration?

KIDS: example example

STEPHANIE: Great job! When two people or cars are racing, they have to accelerate to win. Now, we are going to race marbles to demonstrate this concept!

STEPHANIE: Now, we will discuss the most important kind of acceleration.

HELLA: Yes, this kind of acceleration affects us every second of every day, even right now!

STEPHANIE: It is..... acceleration due to gravity!

HELLA: So, what is acceleration due to gravity? It may sound like a big term, but it's really simple.

STEPHANIE: We all know that if you drop something, it will fall down instead of up, right? This is because of gravity.

HELLA: Yes, gravity is the reason this ball falls down when I drop it (drop a tennis ball to demonstrate)

STEPHANIE: Now, when objects fall, because of gravity, they don’t go at constant speed. Now, what does constant speed mean again?

Kids: Your rate doesn’t change

HELLA: So, all objects that fall down actually accelerate. This means that they….. (ask a kid to answer)

Kids: speed up!

STEPHANIE: Yes! When objects fall, they speed up. This is called acceleration due to gravity.

HELLA: Now, we are going to drop this text book and this crumpled ball of paper. Which do you think will land first?

Kids: the textbook

HELLA: Well, let’s see. (drop them simultaneously)

STEPHANIE: Well, what happened?

Kids: They reached the ground at the same time!

HELLA : Gravity affects all objects the same way, so everything falls at the same rate with the same acceleration, regardless of how big or heavy it is. If we dropped a pebble and a boulder at the same time, they would reach the ground at the same time.

STEPHANIE: Now, look at this. (drops a piece of piece of unfolded paper and a piece of crumpled paper.)

STEPHANIE: Why did this piece of paper (holds up uncrumpled paper) drop more slowly than this one (hold up crumpled)?

Kids: I dont know

HELLA: It is called air resistance. When an object has a large surface, there is a lot of air resistance. This means that it falls more slowly than other objects. This is the idea behind parachutes. They have large surfaces, so they have a lot of air resistance, and they allow people to fall slowly to avoid injuring themselves.

STEPHANIE: Today, we are going to build parachutes for these plastic army men. We will drop them and see whose takes the longest to reach the ground, and who made the best parachute.

HELLA: Now, let's see who can "defy gravity" the best!