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**Daily Science (turn in on separate piece of paper)**

Write the following in scientific notation 504000 Write the following in standard notation 8.3 x 10 -5 9.09 x 104 7.08 x 10-6 1.004 x 107 Convert the following 36 seconds into milliseconds 0.06 kilowatts into watts 19 deciamps into amps

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Motion Pg. 1

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**Frame of reference Used to describe motion in reference to something.**

A fixed point

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**Distance vs. Displacement**

Distance is the total path taken by an object Displacement measures the distance between starting and ending points

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Speed vs. Velocity Speed describes how fast an object moves (called a scalar quantity) Velocity describes speed and direction (called a vector quantity)

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Speed and velocity Formula: distance/time V=d/t Units? ____

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Velocity Practice Find the velocity in meters per second of a swimmer who swims 110 m toward the shore in 72 seconds. Find the velocity in meters per second of a baseball thrown 38 m from third base to first base in 1.7 sec. Calculate the distance in meters that a cyclist would travel in 5.00 hours at an average velocity of 12.0 km/h to the southwest.

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Daily Science pg. 4 A car is traveling east for a distance of 890 meters. It will take the car 37 seconds to travel the distance. What is the cars velocity? A line of dominos is set up on a table. You push the first domino to make the rest fall. The dominos fall at a velocity of 0.2 m/s down the table. It takes 15 seconds for the last domino to fall. How long was the domino line? If you run with an average velocity of 2 m/s toward a goal, a total distance of 400 m, how long would it take you?

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Resultant velocity pg.1 Velocities can be combined to describe the resultant velocity. Ex. You are riding a bus that is traveling 15 m/s east. You stand up and walk toward the back of the bus (now walking east) at 1 m/s. Are you still traveling at the same speed? To find the resulting velocity, just add the velocities together.

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**Instantaneous Speed The speed at a given point.**

Car speedometers measure the speed at a given point.

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**Graphing Speed and Velocity**

Pg. 3

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Distance vs. Time graph X- axis: Y- axis: Type of graph:

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**Practice Data for a runner: When is the runner going the fastest?**

When is the runner moving slower? When is the runner standing still? Time (s) Position (m) 10 20 30

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**Slope The slope of a distance vs. time graph equals speed.**

A slope can be determined by taking the change in the y variable and dividing it by the change in the x variable. Slope = ∆y/ ∆ x (rise/run)

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**Slope practice What is the slope of the line?**

What is the speed of the bug between 2 and 4 seconds? What is the speed at 8 seconds? What might the speed be at 11 seconds?

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Slope

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