NOTES

How Is Motion Measured?

 Speed:  a measure of how ________ something travels in a certain period of _____________.

 Distance / Time = SPEED

 You traveled 5 miles to school in 15 minutes.  What is your speed?

 

 The train traveled 40 miles to NY city in two hours.  What was its speed?

   

Miles per hour:  The number of ___________ something can travel in ________ hour.

 Velocity:  a measure of ___________ in a certain ______________.

 

 

Newton ís Laws of Motion

Name _____________________________

Inertia Ė The tendency of an object to stay at _________ or remain in ________ unless an outside _____________ causes a change.

 Forces work in equal and _______________ pairs.

 How do seatbelts relate to inertia?

  Newton ís First Law of Motion:

 

________________________________________________________________

 

 

Mass Ė the amount of _____________ in an object.

 Which has more mass?    A bike or a bus?   A ping pong ball or a golf ball?

 

Acceleration Ė a rate of __________ in __________ or ______________ of movement.

 Examples of forces:  __________________, ____________________, ___________________

  Newton ís Second Law of Motion: 

 

________________________________________________________________

 

 

Newton ís Third Law of Motion : 

 

 

 

 Law of Conservation of Energy:  Energy cannot be _________________ or ______________________.

Forces That Affect Motion

Name ___________________________

 

Gravity:  A __________ that acts to ________ pairs of objects together.

 Weight:  the force ______________ exerts on an objectís ___________.

 Objects that are closer together have a ______________ attraction than objects that are further apart.

 Gravity makes falling objects _____________________.

 When you throw a ball into the air, why doesnít inertia just keep it going?

 

 Why doesnít the Earth move toward the ball?

   

Why does a person standing on the moon weigh one-sixth as much as he does on Earth?

 

 Friction :  a __________ that _____________ the movement of one surface past another surface.

 Friction ____________ an objectís motion.

 Air Resistance:  _____________ caused by _______ molecules in the sir hitting an object and slowing it down.

What types of surfaces produce the least friction?

 

What types of surfaces produce the most friction?

 

 

Kinetic & Potential Energy

Name _____________________________

 

Kinetic Energy:  the energy of ______________.

 An object has the most kinetic energy when it is moving the fastest.

 Potential Energy:  ____________ energy, or energy that an object has due to its ________________.

 Objects can have potential energy due to position ( a bike at the top of a hill), or in a wound up spring (toy that moves), or in the way atoms are connected (batteries or food).

 Potential energy can change to _____________ energy and kinetic energy can change to ______________ energy.

 A rollercoaster car has the most potential energy and the least kinetic energy at the top of the hill.

 As it goes down the hill, potential energy decreases (itís being used up) and kinetic energy increases.

 At the bottom of the hill the coaster has no more potential energy and the most kinetic energy (itís going at its fastest).

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