Motion and Energy

Motion- An object is in Motion when ________________________________________________________________________________________________________

Reference point - A place or object that can be used to determine if an object is in motion

Motion and Energy

Motion- An object is in Motion whena place or object that can be used

to determine if an object is in motion.

Examples of Newton’s 1st Law:

* a marble will not move unless forced.

* once a marble is moving, it doesn’t stop until forced to!

* if you don’t wear your seatbelt, youhave no force to stop you whenthe car crashes!

since you keep moving, you fly throughthe windshield! (and DIE)

Motion and Energy

Speed=_____________________________

__________________________

Motion and Energy

Speed = Distance divided by Time

Motion and Energy

Velocity - ____________________________________________________

Motion and Energy

Velocity –The speed of an object moving in a

particular direction

Motion and Energy

Velocity –The velocity of the airplane is

defined by both its direction and speed.

Motion and Energy

Velocity –The rate at which the velocity of an

object changes is called acceleration.

That means that an object is accelerating whenever it speeds

up, slows down or changes direction.

Motion and EnergyA Force is a push or pull.

Unbalanced Force acting on an object will change the object’s

motion. Equal forces that act on an object

in opposite directions are called Balanced Forces.

Motion and EnergyNewton’s Laws of Motion

First law Motion- ____________________________________________________

Motion and EnergyNewton’s Laws of Motion

First law Motion- objects at rest stay at rest unless a

force acts upon it.

In two unbalanced forces, friction, air resistance, slow it down.

Motion and Energy__________ measures an object’s

tendency to remain at rest or keep moving. Inertia is related

to mass.

Motion and EnergyInertia measures an object’s

tendency to remain at rest or keep moving. Inertia is related

to mass.

Motion and EnergyNewton’s Second Law -

____________________________________________________

Motion and EnergyNewton’s Second Law –

The net force on an object is equal to the mass of the object

multiplied by it’s acceleration.

Motion and EnergyForce = Mass x Acceleration

Weight and mass are not the same thing. Weight changes when the acceleration due to

gravity changes.

Newton’s 2nd Law of Motion:

Force = mass X acceleration

This means that the magnitude ofthe force is decided by howbig and heavy an object is,and how fast it is moving!

x=

This makes sense:big, heavy objects have a lot of force.

An elephant doesn’t have to move fast!

Small objects can have a lot of force if they are moving FAST.

-a bullet thrown by hand does nothing,but shot at high speed it can kill!

* Things dropped from a moving vehicle don’t fall straight down!

* they keep moving forward untilanother force stops them!

10 N

50 N

50 N

Motion and EnergyMass remains the

_________ no matter what weight is.

Motion and EnergyMass remains the same

no matter what weight is.

Motion and EnergyThird Law of Motion -

______________________________________________

Motion and EnergyThird Law of Motion –

for every action there is an equal and opposite reaction.

Newton’s Third Law of Motion:

For every action, there is an equal

and opposite reaction.

Translation: If you push,

you also get pushed back!

This is why we are able to jump--

when we push the ground, it pushes back!

Motion and EnergyUsing the second law equation, the object with the larger mass

has the smaller ________________________

if the same force is applied.

Motion and EnergyUsing the second law equation, the object with the larger mass

has the smalleracceleration rate

if the same force is applied.

Motion and EnergyThe three laws of motion

describe how any object moves when

___________acts on it.

Motion and EnergyThe three laws of motion

describe how any object moveswhen force

acts on it.

Motion and EnergyTypes of Energy

Potential Energy - _____________________

Example:

Motion and EnergyTypes of Energy

Potential Energy -

Stored energy

Example: ROLLER COASTER AT

TOP OF HILL

Motion and EnergyTypes of EnergyKinetic Energy –

________________________Example:

Motion and EnergyTypes of EnergyKinetic Energy –

Energy in Motion

Example: ROLLER COASTER ROLLING

DOWN THE HILL