1) Find Speed

**2) Find Distance**

**3) Find time**

**Speed**

**Speed**

- a measure of the rate of change

- how fast position changes

- to calculate speed

Speed equals distance divided by time

S

=

d

t

/

SPEED

EQUALS

Divided by

Time

Distance

So ...

d

s

t

Units for these quantities are :

speed =

meters per second

(m/s)

distance =

meters

(m)

time =

seconds

(s)

1) find speed

2) find distance

3) find time

A bike rider travels 500 m in 25 seconds. What is his speed?

s = d / t

so ...

s =

500 m

/

25 s

s =

20 m / s

Now you try a few...

a) A swimmer covers 150 m in 75 seconds. What is her speed?

b) A car travels 1,200 meters in 200 s. What is its speed?

A rabbit is running at 8 m/s. How far will it go in 4 seconds?

d =

s X t

so ...

d =

8 m/s

X

4 s

d =

32 m

Now you try a few ...

a) A snake slithers along at 2.8 m/s. How far will it go in 18 seconds?

b) A shark swims through the Gulf of Mexico at 5.3 meters per second. How far will it go in 12 s?

**A car covers a distance of 575 meters, while traveling at 25 m/s. How long does this take?**

t =

d / s

so ...

t =

575 m

/

25 m/s

t =

23 s

Now you try a few ...

a) How long does it take to go 25 meters at a speed of 1.75 m/s?

b) A baseball is thrown at 72 meters per second. How long does it take to get to home plate 12 m away?

You should now be able to complete the speed assignments. When you are finished, you may take the speed party. Good Luck!