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