Presentation on theme: "Daily Science (turn in on separate piece of paper)"— Presentation transcript:
1 Daily Science (turn in on separate piece of paper) Write the following in scientific notation504000Write the following in standard notation8.3 x 10 -59.09 x 1047.08 x 10-61.004 x 107Convert the following36 seconds into milliseconds0.06 kilowatts into watts19 deciamps into amps
3 Frame of reference Used to describe motion in reference to something. A fixed point
4 Distance vs. Displacement Distance is the total path taken by an objectDisplacement measures the distance between starting and ending points
5 Speed vs. VelocitySpeed describes how fast an object moves (called a scalar quantity)Velocity describes speed and direction (called a vector quantity)
6 Speed and velocityFormula: distance/timeV=d/tUnits? ____
7 Velocity PracticeFind 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.
8 Daily Science pg. 4A 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?
9 Resultant velocity pg.1Velocities 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.
10 Instantaneous Speed The speed at a given point. Car speedometers measure the speed at a given point.
12 Distance vs. Time graphX- axis:Y- axis:Type of graph:
13 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)102030
14 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)
15 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?