Frame of Reference

Distance

The length of the path between two points.

Displacement

The difference between the original or starting point and the final

or end position.

Vector addition

A boat travels at 150 m due east. It then turns to a heading

and moves 34 m west.

a. What is the distance the boat travelled?

b. What is the displacement of the boat?

184 m

116 m east

A dog runs the following vectors:

120 m due west

Then turns and runs 320 m due east

Then turns and runs for 275 m west again

a. What is the distance the dog travelled?

b. What is the displacement of the dog?

715 m

75 m west

The distance traveled over a given amount of time

V = d / t

m / s

Speed over the entire duration of a trip

Speed at a particular instant in time

Speed

Speed with a direction (Vector)

V = d / t

Constant Speed

V = d / t

d = 50 m

t = 5 s

V = 50m / 5s

v = 10 m/s

V = d / t

V =

d =

t =

?

2,445 m

415 s

V = 2,445 m / 415 s

V = 5.89 m/s towards the sun

V = d / t

V = d / t

V =

d =

t =

?

250,000 meters

18,000 seconds

V = 250,000 / 18,000

V = 13.89 m/s

V = d / t

V = d / t

V =

d =

t =

165 m/s

?

30 seconds

d = 165 m/s x 30 seconds

d = 4,950 meters

d = v x t

• Constant speed

• Away from start

• Constant speed

• Faster than “1”

• Away from start

Stopped

• Constant speed

• Back to start

Stopped

• Constant speed

• Back to start

A girl walking due north at 1 m/s to her classroom

A robot moving at 10 m/s while moving along a curved track

A man walking at 10 m/s in a circular path

A women walking in straight path at 10 m/s

Velocity

Velocity

Velocity

Speed

a. What is the displacement of the person from the initial point

in the two day journey?

3 m East

b. What is the distance travelled by the person from the initial

point in two days?

13 m

9 m East

Captain Hook is on his pirate ship about ready to attack an island. A

fisherman is sitting directly to the side of his boat watching the boat.

The Captain fires a cannonball at 20 m/s towards the island. How fast is

the cannonball moving from the fisherman’s perspective?

20 m/s (towards island)

Captains Hooks boat starts moving at 10 m/s towards the island. If the

Captain fires another shot with his cannon at 20 m/s in the same

direction that the boat is moving, how fast does the cannonball moving

from the same fisherman’s perspective?

30 m/s (towards island)

The Captains boat is still moving at 10 m/s towards the island, but the

Captain turns the cannon around and fires another shot with his cannon

at 20 m/s towards an oncoming boat. How fast is the cannonball moving

from the fisherman’s perspective?

10 m/s (towards boat)

New item for your quizzes

Look at your quiz!!!

Version

“A”

Look at your quiz!!!

Version

“B”

100 Points

4 True/False

8 Matching

38 Multiple Choice

All notes in your packet are fair game!!!

No additional time when the class ends. Manage your time

wisely!!!

No cell phones on quiz day!!!

1st Semester Results

92.6% 6th Period Average

89.3% 5th Period Average

A’s = 29 Students

B’s = 7 Students

C’s = 3 Students

D’s = 0 Students

F’s = 0 Students

Unit 11: Speed/Velocity

Average = 90.9/100 (90.9%)

Test Taken = 39

High: 100 (3 perfect)

Low: 71