Vocab
created when 2 forces are in contact with another
what is friction
forces that produce a net force greater than zero
what are unbalanced forces
Matt throws a paper airplane. How will gravity make the airplane move?
What is down toward the ground
what is an object that is motion stays in motion
ex- in a car when the brakes are applied you move forward until the seat belt stops you.
what is Newton's First Law
The tendency to do nothing or remain unchanged - resistance to an object changing its motion, starting to move, stopping or changing motion
what is inertia
combination of all the forces acting on an object
what is net forces
the scientific unit for weight and force of gravity
what is newton
Unlike Friction, gravity
acts over a distance between objects and acts between objects that are NOT touching. (Friction must touch the object)
the acceleration of an object is dependent on net force and mass ex- in golf putting vs. driving different forces result in different accelerations of ball
explains why its easier to push a bicycle than a car with the same acceleration
what is Newton's Second Law
How are mass and inertia related?
The more massive an object the more inertia it will have
forces that produce a net force of zero
what are balanced forces
the push or pull acting on an object
what is force
the acceleration due to gravity
what is 9.8 m/s squared 2
every action has an equal and opposite reaction. force always acts in PAIRS
explains how a rocket accelerates
What is Newton's Third Law
Sliding friction and moving friction
What is kinetic friction
created when enough air resistance works against acceleration due to gravity
what is terminal velocity
Object that is falling no longer accelerates as it falls
what is the path of one object around another object as a result of a horizontal motion and _____
what is freefall
frictional force air exerts against the moving object- feather has more air resistance than a ping pong ball - it will fall slower
what is air resistance
What is the property of a moving object that makes the object hard to stop
what is momentum
momentum= mass X velocity
Acts on objects when they are resting on a surface
What is static frcition
the motion of an object as a result of a horizontal force and the force of gravity
what is projectile motion
the force of attraction between two masses
what is gravity
the two components of projectile motion
what are the forward/horizontal motion or (parallel motion) or thrust and the downward forces of gravity example- cannon being shot, pitching, throwing, archery, target shooting
when an action and a reaction occur momentum is transferred from one object to another.
It is related to Newton's Third Law - forces produce action and reaction ex- hammer and nail (equal and opposite)
what is Law of Conservation
The rate of which velocity changes over time
What is acceleration
acceleration = final velocity
time taken