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textbook - Coggle Diagram
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Forces
force and mass determin acceleration
newtons second law relates tto force mass and acceleration
force = mass times accelration
newtons second law
mass and acceleration
forces can change the direction of motion
circular motion and newtons second law
centripetal forces
Forces transur momentum
objects in motion have momentum
momentum=mass times velocity
momentum is consurved
momentum and newtons third law
two types of collision
momentum can betranfured from one object to another
Forces change motiion
a force is a push or pull
size and direction of forces
ballened and unballenced forces
net force
types of forces
forces on moving objects
Galileo's thought experiment
newtons first law
inurtia
forces act in pairs
newtons third law ralates action and reaction forces
action and reaction forces vercus balanced forces
newtons three laws describe and predict motion
gravity friction and pressure
friction is a force that opposes motion
frition occures when sufaces slide against each other
forces and surfaces
friction and heat
motion though fluids produces friction
air resitance
pressure depends on force and area
pressure describes how a force is spread over an area
pressure=force over area
pressure acts in all directions in fluids
pressure in fluids depends on depth
pressure in air
pressure in water
gravity is a force exerted by masses
masses atteract each other
weight and mass
forces of gravity
gravity on earth
gravity keeps objects in orbit
people in orbit
spacecraft in obit
fluids ca exurt a force on a objects
the motion of a fluid affects its pressure
bernoullis priciable
applying bronolies pricable
forces can be transmitted though fluids
hydrolics
pascals princalbe
fluids can exurt an upwards force
bouyance
density and bouyancy
Motion
An object in motion changes position
Position describes the location of an object
Describing a position
reference point
motion is a change in position
describing motion
relative motion
Acceleration mesures how fast velocity changes
speed and direction can change with time
acceleration
acceleration can be from velocity and time
Acceleration=final veloocity-initial velocity over time
Speed mesures how fast position changes
Position can change at different rates
calulating speed
speed=distance/time
average speed
distance-time graphs
velocity includes speed and direction
vector is both size and direction
velocity vs speed
machines
six simple machines have many uses
there are 6 simple machines
pulley
screw
wheel and axle
inclined plane
lever
wedge
the mechanical advantage of a machine can be calculated
MA=Fout out Fin
modern tech uses compound machines
modern use compound machines
compound machines re combinations of simple machiens
gears
mechanical advantage of compound machines
modern tech creats new uses for machines
machines help people do work
work tranfures enrgy
energy
work
output work is always less than input work
efficiency and energy
increasing efficiency
efficiency=output work oer input times 100
machines change the way force is applied
changing direction
mechanical advantage is output force over input force
changing size and distance
work and energy
when energy is tranfurred when work is done
work tranfures energy
total amount of enrgy is constant
losing mechanical energy
forms of energy
conserving mechanical energy
work changes potential and kinetic energy
calculating kinetic energy
calculation mechanical energy
calculating grav potential energy
power is the rate at which work is done
power can be calculated from energy and time
everyday power
power = energy over time
calculating power from energy
power cab be calulated from work and time
power = work over time
calculating power from work
hourse power
work is the use of force to move an object
force is nessisary to do work
force,motion and work
calculation work
work=force times distance
objects that are moving can do work