the speed at which a falling object accelerates at is.....
9.8 m/s/s down per second
freefall
when gravity is the only force acting upon an object.
net force
the force that results from combining all the forces exerted on an object
terminal velocity
the velocity at which a falling object travels when the force of air resistance exactly matches the downward force of gravity
centripetal force
the unbalanced force that causes an object to move in a circular path
weightless
because of free fall, astronauts appear this way in orbit
newtons third law
states that objects exert equal and opposite forces on eachother
projectile motion
the curved path traveled by a thrown baseball
inertia
the tendency of an object to resist any change in its motion
gravity
the acceleration of a falling object is caused by this
momentum
a property of a moving object that depends on the objects mass and velocity
newton first law of motion
an object at rest, remains at rest and an object in motion remains in motion at a constant speed and in a straight line unless acted o by an unbalanced force.
newtons second law of motion
the acceleration of an object depends on the mass of the object and how much force is applied
air resistance
the fluid friction that opposes the motion of objects through air
the two motions that are combined to form projectile motion
horizontal and vertical
unit for force
newtons
unit for mass
kilograms
unit for acceleration
m/s/s direction