force, motion, energy

Force, Motion and Force, Motion and EnergyEnergy

How do things move?How do things move? AboveAbove BelowBelow AheadAhead BehindBehind UpUp DownDown HorizontallyHorizontally VerticallyVertically Right Right LeftLeft

How do we know something How do we know something has moved?has moved?

By looking at the things By looking at the things that are not moving that are not moving around it. around it.

FRAME OF REFERENCE FRAME OF REFERENCE

SpeedSpeed

What is speed? What is speed? How fast an object How fast an object

is moving.is moving. Measure of Measure of

distance.distance.

SpeedSpeed

How do I calculate How do I calculate speed? speed?

DISTANCE / TIMEDISTANCE / TIME

Ex:10ft/ 3 seconds=3.1 ft/secEx:10ft/ 3 seconds=3.1 ft/sec

ForceForce

WHAT IS FORCEWHAT IS FORCE??

Any Any pushpush or or pullpull that that causes an object to causes an object to move, move, stopstop or or change change speedspeed or or directiondirection. .

ForceForce

The greater the The greater the force, the greater the force, the greater the change in motion. change in motion.

The bigger an object The bigger an object is, the less effect a is, the less effect a force will have on it.force will have on it.

The smaller an object The smaller an object is, the more effect a is, the more effect a force will have on it.force will have on it.

InertiaInertia

InertiaInertia keeps an keeps an object still or keeps object still or keeps it moving. it moving.

A moving object will A moving object will keep moving until keep moving until something stops itsomething stops it..

An object that is not An object that is not moving will not moving will not move until move until something moves something moves itit. .

FrictionFriction

WHAT IS FRICTION?WHAT IS FRICTION? The force that works The force that works

against motion.against motion. Friction causes heat. Friction causes heat.

WorkWork

WHAT IS WORK?WHAT IS WORK? Work is done when Work is done when

a force is used to a force is used to MOVEMOVE an object a an object a certain distance.certain distance.

EnergyEnergy

WHAT IS ENERGY?WHAT IS ENERGY?

Energy is the ability to do work.Energy is the ability to do work.

EnergyEnergy

Two types of Two types of energy:energy:

Kinetic Kinetic PotentialPotential

EnergyEnergy

Kinetic-moving Kinetic-moving energy (energy of energy (energy of motion)motion)

EnergyEnergy

Potential- stored Potential- stored energy (energy energy (energy waiting to be used)waiting to be used)

Forms of EnergyForms of Energy

Chemical EnergyChemical Energy Ex: Ex: storedstored energy energy

in food and fuel.in food and fuel.

Forms of EnergyForms of Energy

Electrical EnergyElectrical Energy Ex: batteries, Ex: batteries,

electric in homeselectric in homes

Forms of EnergyForms of Energy

Light energyLight energy Ex: sun and lasersEx: sun and lasers

Forms of EnergyForms of Energy

Mechanical EnergyMechanical Energy Ex: wind, water Ex: wind, water

falling over a water falling over a water fall, soundfall, sound

Forms of EnergyForms of Energy

Thermal EnergyThermal Energy Ex: stove, heaters, Ex: stove, heaters,

matchesmatches

Forms of EnergyForms of Energy

Nuclear EnergyNuclear Energy Ex: SunEx: Sun

Forms of EnergyForms of Energy

CAN ENERGY CAN ENERGY CHANGE FORM? CHANGE FORM? YES! YES!

Ex: The fuel in a Ex: The fuel in a rocket changes rocket changes from chemical from chemical energy to energy to mechanical energy mechanical energy when the fuel when the fuel burns burns

Simple MachinesSimple Machines

LeversLevers PulleyPulley Wheel and AxelWheel and Axel Inclined PlaneInclined Plane Wedge and ScrewWedge and Screw GearsGears

Simple MachinesSimple Machines

LeversLevers

Two parts:Two parts:

FulcrumFulcrum

BarBar

Simple MachinesSimple Machines

PulleyPulley Two kinds: Two kinds:

FixedFixed

MoveableMoveable

Simple MachinesSimple Machines

Wheel and AxelWheel and Axel Two parts:Two parts:

wheel wheel

barbar

Simple MachinesSimple Machines

Inclined PlaneInclined Plane

A flat, slanted A flat, slanted surfacesurface

Simple MachinesSimple Machines

Wedges and Wedges and ScrewsScrews

change change downward downward force into force into sidewayssideways forceforce

Simple MachinesSimple Machines

GearsGearsWheels with teethWheels with teeth

Compound MachinesCompound Machines

WHAT IS A WHAT IS A COMPOUND COMPOUND MACHINE?MACHINE?

A machine made up A machine made up of two or more of two or more simple machines.simple machines.