Gravity and Motion
In ancient Greece, a great thinker named _________ said that heavy objects fall faster than light objects.
Aristotle
An object is in _____ when it is going around another object in space.
orbit
A _____ is a push or a pull.
force
Newton’s first law is often called the ___ __ _______.
Law of inertia
___ _________ is the force that opposes the motion of falling objects.
Air resistance
___________ _____ is the force that keeps an object moving in a circular path.
Centripetal force
___ _____ is the total force acting on an object.
Net force
Newtons 2nd law
1. The acceleration of an object depends on the mass of the object. If two objects are pushed or pulled by the same force, the object with the smaller mass will acceleration.
2. The acceleration of an object depends on the force
applied to the object. If two objects have the same
mass, the one you push harder will accelerate more.
________ ________ is the speed of an object when the force of air resistance equals the force of gravity.
Terminal velocity
__________ ______ is the curved path an object follows when it is thrown near the Earth’s surface.
Projectile motion
Newtons 1st law
1. An object at rest will remain at rest.
2. An object moving at a constant velocity will continue to move at a constant velocity.
________ is the product of the mass
and velocity of an object.
Momentum
____ ____ is the motion of an object when gravity is the only force acting on the object.
Free fall
________ is a force that is produced whenever two
surfaces touch each other.
Friction
Like ________, momentum has direction.
velocity
______ is a measure of the pull of gravity on an object.
Weight
_______ is the ability of an object to resist any change in motion.
Inertia
During a collision, the total momentum of the two objects remains the same. Total momentum doesn’t change. This is called ___ ___ __ ____________ __ ________.
The law of conservation of momentum.