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motion and forces - Coggle Diagram
motion and forces
gravity,friction, and pressure
gravity is a force exerted by masses
masses attract eachother
gravity keeps objects in orbit
greater mass is greater gravity
friction is a force that opposes motion
friction occurs when surfaces slide against eachother
motion through fluids produces friction
gases and liquids are fluids
pressure depends on force and area
pressure describes how a force is spread over an area
pressure acts in all direction in fluids
pressure in fluids depend on depth
fluids can exert a force on objects
fluids can exert upward force on objects
motion of a fluid affects its pressure
forces can be transmitted through fluids
forces
forces change motion
a force is a push or a pull
newtons first law relates force and motion
inertia is the resistance of an object to a change its motion
force and mass determine acceleration
newtons second law relates force, mass, and acceleration
f=ma
forces can change the direction of motion
forces act in pairs
newtons third law relates action and reaction forces
newtons three laws describe and predict motion
forces transfer momentum
objects in motion have momentum
momentum=mass x velocity
motion
an object in motion changes position
motion is a change in positioin
position is the location of an object
speed measures how fast position changes
position can change at different rates
s=d/t
velocity includes speed and direction
acceleration measures how fast velocity changes
speed and direction can chnge with time
acceleration can be calculated with velocity an time
a=v(final)-v(initial)/time
work and energy
work is the use of force to move an object
forces is necessary to do work
work = force x distance
objects that are moving can do work