Motion An object is in motion if ___________ from another object ______________.

Motion

• An object is in motion if ___________ from

another object ______________.

Reference Point

• A place or object used for _________ to determine if an object is ___________.

• The ______is the reference point.

• Distance an object travels/unit of time.

Speed

Speed =

• Units used:

Speed

Speed =

DistanceSpeed =Time

Constant Speed

• Speed ________ ___________.

• (like cruise control—no stopping, no speeding up, no slowing down)

Average Speed

• ______ _________ traveled in the ______ __________ of time.

• (like driving to Chicago—stop lights, traffic jams, rest stops)

Velocity

• Speed in a ________ _____________.

• When you know _______ _______ and the ____________ an object is traveling, you know its velocity.

Speed Practice Problem

• It took Ms. Ericson 14 seconds to run the 100 meter dash at the 1968 Olympics. What was her speed?

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Acceleration

• _____ at which ________ (speed in a certain direction) changes.

• ___________ speed, ___________ speed, or ___________ ___________.

Acceleration Formula

Velocityfinal-VelocityinitialAcceleration =

Time

Acceleration Units

Velocityfinal-VelocityinitialAcceleration =

Time

m/s – m/sAcceleration =

sec= _____

Practice Problem

• You are sitting on your bike at the top of a hill. You start riding and at the bottom of the hill you are going 5 m/s. It takes you 2 seconds to get to the bottom of the hill. What is your acceleration?

• Solve using IFSMU

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