motion. how do we know something is moving?
TRANSCRIPT
Motion
How do we know something is moving?
Frame of Reference
To tell an object is moving we must compare the object to something else.
A reference point is an object used to determine another objects motion.
Motion
Motion is the change in position of an object over time.
Speed/Rate and Velocity
Speed/Rate is the distance an object moves in a certain period of time.
Velocity is the speed of an object in a specific direction.
To solve for speed, take the distance and divide the time.
Stevenson Digs Tacos
Graphing Motion
Line Graph-Time vs. Distance The slope of two points on the graph will tell
you the speed.
Solving For Speed
If Mr. Cleland runs 10 meters in 2 seconds, what is his speed?
5 m/s If Mr. Parke throws a baseball 12 meters in 4
seconds, what is the speed of the ball? 3 m/s
Time=distance/speed Distance=time x speed If Mr. Whiting runs 15 meters at a speed of 3
m/s, how long does it take him?5 seconds
If Ms. Hetrick runs for 5 seconds at a speed of 4 m/s, how far has she ran?20 meters
Acceleration
The rate speed/rate at which velocity changes.If speed or direction change.
Acceleration is final speed – starting speed divided by time.
If Mrs. Greiser is driving and accelerates from 10 m/s to 16 m/s in 3 s, what is her acceleration?
2 m/s^2
Graphing Acceleration
Line Graph-Time VS Speed