Thursday, March 18, 2010

Seventh Grade Week 21

We move from position and motion to speed and acceleration.

What is speed?
What is acceleration?
How are they measured?

We also want to be finding interesting experiments in physics. Why are they important and how do they tie in with what we are covering? To help get the ball rolling we will look at some great discoveries and experiments throughout history in the Science Channel's presentation of 100 Greatest Discoveries: Physics.

This weeks contract has you designing a lab, demonstration, inquiry that teaches us about speed or acceleration. The best presentations will be done by both classroom groups on lab days(Wednesdays).

15 comments:

casper said...

How fast is the fastest person in the in USA

BDUB IN DA CLUB said...

Speed is measured in meter per second, miles per hour, etc.

Moses said...

Speed is the distance and time and acceleration is velocity and time.

traverse said...

why do things accelerate?

Kassi said...

Speed is the measurement of how fast you are going.In the US, we use mph. In the rest of the world it is kph, kelometers per hour. The formula for finding speed is distince divided by time

Rachel S. said...

I dont really understand what a vector is. Can anybody explain?

Unknown said...

do you always have to compare two things with accceleration or can it just be one object

Amy Holec said...

to find acceleration you have to find speed first which is D/T=S. Acceleration is the final velocity-initial velocity over T.

Giese said...

Things accelerate becuse oftherwise you could not get started moveing without accelerate.

Ben H said...

If you were 120m up in the air how fast does it take to hit the ground.

Anton said...

Is it posible for an object to move without acceleration?

Julia Novotny said...

^Speed-how fast object goes in amount of time=d/t, measured mps
^Velociy-speed in certain direction, is a vector= has size(speed) and direction
^Acceleration-how quickly velocity changes=final velocity-initial velociy divide by time, measured mps2

Unknown said...

speed is measured by distance divided by time. Kat you can just find the acceration of one thing if you want. Rachel a vector is an object.

josh lienau said...

lina kriket is able to run 1.5 miles in 10 min.

josh lienau said...

i walk 10 meters per 10 seconds