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Simple MachinesMrs. ChastainThird Grade
Friday, August 16, 13
Machine A tool that helps us do work
Friday, August 16, 13
Machine A tool that helps us do work
Friday, August 16, 13
Machine A tool that helps us do work
Machines help us by:
Friday, August 16, 13
Machine A tool that helps us do work
Machines help us by:1. Changing the amount of force on an
object.
Friday, August 16, 13
Machine A tool that helps us do work
Machines help us by:1. Changing the amount of force on an
object.
Friday, August 16, 13
Machine A tool that helps us do work
Machines help us by:1. Changing the amount of force on an
object.
2. Changing the direction of the force.
Friday, August 16, 13
Force a push or pull that changes the motion or shape of an object
Example: I push a bookshelf to move it.
Friday, August 16, 13
Force a push or pull that changes the motion or shape of an object
Example: I push a bookshelf to move it.
Friday, August 16, 13
Energy the ability to do work
Example: I must have energy to run the mile.
Friday, August 16, 13
Energy the ability to do work
Example: I must have energy to run the mile.
Friday, August 16, 13
Work the result of force moving an
object
Example – Picking up something heavy is
hard work!
Friday, August 16, 13
Work the result of force moving an
object
Example – Picking up something heavy is
hard work!
Friday, August 16, 13
Work the result of force moving an
object
Example – Picking up something heavy is
hard work!
Friday, August 16, 13
Gravity
Gravity is the force that constantly pulls objects toward Earth.
Friday, August 16, 13
Gravity
Gravity is the force that constantly pulls objects toward Earth.
Friday, August 16, 13
Simple Machineshave few or no moving parts
Friday, August 16, 13
Simple Machineshave few or no moving parts
Friday, August 16, 13
Simple Machineshave few or no moving parts
• Lever
Friday, August 16, 13
Simple Machineshave few or no moving parts
• Lever• Inclined Plane
Friday, August 16, 13
Simple Machineshave few or no moving parts
• Lever• Inclined Plane• Wedge
Friday, August 16, 13
Simple Machineshave few or no moving parts
• Lever• Inclined Plane• Wedge• Screw
Friday, August 16, 13
Simple Machineshave few or no moving parts
• Lever• Inclined Plane• Wedge• Screw• Wheel and Axel
Friday, August 16, 13
Simple Machineshave few or no moving parts
• Lever• Inclined Plane• Wedge• Screw• Wheel and Axel• Pulley
Friday, August 16, 13
Lever made of a board or bar (arm)
set on top of a fulcrum used to lift weight
Example: seesaw, crowbar, baseball bat, rake
Friday, August 16, 13
Lever made of a board or bar (arm)
set on top of a fulcrum used to lift weight
Example: seesaw, crowbar, baseball bat, rake
Friday, August 16, 13
Lever made of a board or bar (arm)
set on top of a fulcrum used to lift weight
Example: seesaw, crowbar, baseball bat, rake
Friday, August 16, 13
Lever made of a board or bar (arm)
set on top of a fulcrum used to lift weight
Example: seesaw, crowbar, baseball bat, rake
Friday, August 16, 13
Lever made of a board or bar (arm)
set on top of a fulcrum used to lift weight
Example: seesaw, crowbar, baseball bat, rake
Friday, August 16, 13
Inclined Plan a slanted surface to make
lifting easier
Example: ramp, stairs
Friday, August 16, 13
Inclined Plan a slanted surface to make
lifting easier
Example: ramp, stairs
Friday, August 16, 13
Inclined Plan a slanted surface to make
lifting easier
Example: ramp, stairs
Friday, August 16, 13
Wedge two inclined planes together used to
raise an object or split an object
Example: knife, door wedge, ax
Friday, August 16, 13
Wedge two inclined planes together used to
raise an object or split an object
Example: knife, door wedge, ax
Friday, August 16, 13
Wedge two inclined planes together used to
raise an object or split an object
Example: knife, door wedge, ax
Friday, August 16, 13
Screw an inclined plane wrapped around a pole or shaft that is used to hold
materials together or drill holes
Example: drill bit, screws
Friday, August 16, 13
Screw an inclined plane wrapped around a pole or shaft that is used to hold
materials together or drill holes
Example: drill bit, screws
Friday, August 16, 13
Screw an inclined plane wrapped around a pole or shaft that is used to hold
materials together or drill holes
Example: drill bit, screws
Friday, August 16, 13
Screw an inclined plane wrapped around a pole or shaft that is used to hold
materials together or drill holes
Example: drill bit, screws
Friday, August 16, 13
Wheel and Axel a wheel that turns on a post to help
move things quickly and easily
Example: steering wheel, doorknob, screwdriver
Friday, August 16, 13
Wheel and Axel a wheel that turns on a post to help
move things quickly and easily
Example: steering wheel, doorknob, screwdriver
Friday, August 16, 13
Pulley made of rope and string wound
around a reel to change the direction of a force
Example : flagpole, clothesline, cranes, fishing reel
Friday, August 16, 13
Pulley made of rope and string wound
around a reel to change the direction of a force
Example : flagpole, clothesline, cranes, fishing reel
Friday, August 16, 13
Compound Machine two or more simple machines
Examples:
Bike
Car
Friday, August 16, 13
Compound Machine two or more simple machines
Examples:
Bike
Car
Friday, August 16, 13
How Work is Done
Energy Force Function
Work is done!
Friday, August 16, 13
How Work is Done
Energy Force Function
Work is done!
Friday, August 16, 13