ch 9 sec 2 speed and velocity calculating speed key- to calculate speed of an object divide the...

CH 9 SEC 2CH 9 SEC 2

SPEED AND VELOCITYSPEED AND VELOCITY

CALCULATING SPEEDCALCULATING SPEED

KEY- TO CALCULATE SPEED OF AN KEY- TO CALCULATE SPEED OF AN OBJECT DIVIDE THE DISTANCE THE OBJECT DIVIDE THE DISTANCE THE OBJECT TRAVELS BY THE AMOUNT OF OBJECT TRAVELS BY THE AMOUNT OF TIME IT TAKES TO TRAVEL THE TIME IT TAKES TO TRAVEL THE DISTANCE- DISTANCE- SPEED= DISTANCE/TIMESPEED= DISTANCE/TIME

S = D/TS = D/T EX- A CYCLIST TRAVELS 30KM IN 2 HREX- A CYCLIST TRAVELS 30KM IN 2 HR WHAT IS THE SPEED PER HR? S= WHAT IS THE SPEED PER HR? S=

distance 30km divided by time 2hrs or 30/2 distance 30km divided by time 2hrs or 30/2 = ? Km per hour= ? Km per hour

CONTDCONTD

AVERAGE SPEED (AVERAGE SPEED (V) - IS THE TOTAL V) - IS THE TOTAL DISTANCE DIVIDED BY TOTAL TIMEDISTANCE DIVIDED BY TOTAL TIME

EX- RUNNER TRAVELS 10 KM IN FIRST EX- RUNNER TRAVELS 10 KM IN FIRST 2 HRS AND 5KM IN THE LAST HR2 HRS AND 5KM IN THE LAST HR

TOTAL DISTANCE =15…….TOTAL TIME TOTAL DISTANCE =15…….TOTAL TIME 3HRS3HRS

What is the AVERAGE SPEED (V)= total What is the AVERAGE SPEED (V)= total D/ total T time?……D/ total T time?……

calculatecalculate

If a car vtravels 300 miles in 6 hr how fast If a car vtravels 300 miles in 6 hr how fast is it going?is it going?

If you move 10 meters in 2 seconds what If you move 10 meters in 2 seconds what is your speed?is your speed?

A plane travels 6000 miles in 24 hours A plane travels 6000 miles in 24 hours what is its speed?what is its speed?

VELOCITYVELOCITY

VELOCITY- IS THE VELOCITY- IS THE SPEEDSPEED AND AND

DIRECTION DIRECTION OF AN OBJECT.OF AN OBJECT.EX- VELOCITY OF A STORM COULD BE EX- VELOCITY OF A STORM COULD BE

25KM/h TO THE WEST25KM/h TO THE WESTKEY – CHANGES IN VELOCITY MAY KEY – CHANGES IN VELOCITY MAY

INCLUDE CHANGES OF SPEED, INCLUDE CHANGES OF SPEED, CHANGES OF DIRECTION, OR BOTHCHANGES OF DIRECTION, OR BOTH

GRAPHING SPEEDGRAPHING SPEED

KEY – THE STEEPNESS OF A LINE IS KEY – THE STEEPNESS OF A LINE IS CALLED THE SLOPECALLED THE SLOPE

KEY- THE SLOPE OF A DISTANCE-KEY- THE SLOPE OF A DISTANCE-VERSUS-TIME GRAPH REPRESENTS VERSUS-TIME GRAPH REPRESENTS SPEED, THAT IS, THE RATE THAT SPEED, THAT IS, THE RATE THAT DISTANCE CHANGES IN RELATION TO DISTANCE CHANGES IN RELATION TO TIME.TIME.

GRAPHGRAPH

Q AND AQ AND A

1- ABC1- ABC2-ABC2-ABC3-AB3-AB