Agenda – 95 min 1.AS: KWLSpeed/Velocity 2.INM: Notes 3.GP: Geico Gecko 4.IP/HW.
11
Agenda – 95 min 1. AS: KWL Speed/Velocity 2. INM: Notes 3. GP: Geico Gecko 4. IP/HW
-
Upload
ruth-hutchinson -
Category
Documents
-
view
215 -
download
0
Transcript of Agenda – 95 min 1.AS: KWLSpeed/Velocity 2.INM: Notes 3.GP: Geico Gecko 4.IP/HW.
Agenda – 95 min
1. AS: KWL Speed/Velocity2. INM: Notes3. GP: Geico Gecko4. IP/HW
Speed and velocity
Bell Ringer:
•What do you already know about speed and velocity?
Speed Velocity
Speed is a scalar quantity Velocity is a vector quantity
Speed is the change in distance over the change in time
Velocity is the change in displacement over the change in time
Speed will be constant if you move at the same rate.
Velocity will be constant if you move at the same rate in the same direction
Speed is always positive. Velocity can be positive or negative depending on which direction you are moving
Speed and velocity can often be the same. But the two are NOT used interchangeably in physics
As we move forward, think when they would be the same and when they would be different
Calculating speed
•Speed depends on two things▫Distance (how far an object traveled)▫Time (how long it took to travel)
•If you want to calculate speed, how do you put distance and time together mathematically?▫You just came up with a physics formula!
Good job young scientist!
•The formula for speed and velocity looks like:
▫v = velocity measured in m/s or km/hr
▫∆d = change in displacement measured in meters, kilometers, centimeters,
etc.▫∆t = change in time
measured in seconds, minutes, hours, etc.
Remember?!A change in any quantity, indicated by the Greek symbol delta (∆) is equal to the final value minus the initial value.
v=∆d ∆t
•Remember: LESS is MORE
•List•Equation
•Solve•State
•All answers MUST be set out correctly!
“This is how to ALWAYS set out your answers. Make it so.”
Let’s try this!
•We will be solving word problems from here on out, and I would like us to follow these five simple steps:
1. Draw a picture2. List the given information3. Identify the unknown variable4. Write the appropriate formulas5. Plug and solve
I DO
•A cheetah, the fastest animal in the world, ran at you for 6 seconds and covered 180 m. What’s its speed? (Do you think you can out run it?)
WE DO
•Lightening Bolt ran 100 m in 9.5 seconds. What is his speed to 1 decimal point? (do you think you can beat him?)
YOU DO
•Please practice solving the rest of your worksheet
