Motion and Forces (Forces (Forces and mass determine acceleration. (F=ma…
Motion and Forces
Forces change motion.
Forces and mass determine acceleration.
F=ma (Force equals mass times acceleration)
Forces act in pairs.
Forces transfer momentum.
p=mv (momentum equals mass times velocity)
Gravity, Friction, and Pressure
Friction is a force the opposes motion
Pressure depends on force and area.
P=F/A (pressure equals force divided by area)
Gravity is a force exerted by masses.
Fluids can exert a force on objects.
Speed measures how fast position changes.
S=d/t (Speed equals distance divided by time)
Acceleration measures how fast velocity changes.
a=v[final]-v[initial]/t (acceleration equals final velocity minus initial velocity divided by time)
An object in motion changes position.
Work and Energy
Energy is transferred when work is done.
Power is the rate at which work is done.
Work is the use of force to move an object.