6.1 - Vector diagram for UCM

Do now ( 5 mins)

● In your worksheet
● Read the CFS carefully to be

successful in this task.

● Silent and solo
● No Chromebooks

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Do now ( 5 mins)

2

1. Toby is running down the street at a velocity of +2.0 m/s

when he spots a squirrel. He accelerates to a velocity of
+5.5 m/s in 2.5 seconds in order to catch the squirrel.

a. At what rate did Toby accelerate?

vi

t

vf

Do now ( 5 mins)

3

1. Toby is running down the street at a velocity of +2.0 m/s

when he spots a squirrel. He accelerates to a velocity of
+5.5 m/s in 2.5 seconds in order to catch the squirrel.

b. How far did Toby travel while he was accelerating?

vi

t

vf

Do now ( 5 mins)

4

1. Toby is running down the street at a velocity of +2.0 m/s

when he spots a squirrel. He accelerates to a velocity of
+5.5 m/s in 2.5 seconds in order to catch the squirrel.

c. After accelerating, Toby remains at a constant
velocity of 5.5 m/s. How far will he travel after another
7 seconds passes?

vi

t

vf

Stamp

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What are the thinking steps for selecting a kinematic
formula?

Launch 1

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Launch 1

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Demonstration

Launch 1

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1. What about this demo reminds you

of the video of the ride?

2. How does this demo help us make

sense of the phenomena?

Launch 1

3. Draw a diagram to represent the motion
of your classmates spinning in the
demonstration.

First Attempt:

CFS:

❏ Draw a circle and include arrows to depict the direction of rotation/revolution.

❏ Include a solid line vector pointing to the direction of force.

❏ Include a dotted line vector to show the velocity of the object at each point.

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Revised Model

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Fc = Centripetal force
vector

ac = Centripetal
acceleration vector

v= tangential/ linear
velocity vector.

STAMP:
What needs to be labeled in a uniform circular
motion drawing?

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1. The direction of rotation/revolution.
2. centripetal force ( the net force for UCM) .
3. Centripetal acceleration.
4. Tangential velocity.