a push or pull that acts on an object
a unit named after Sir Isaac Newton that measures force. N=kgm/s^2
a force that opposes tha motion of ovjects that touch as they move past each other.
the friction force that acts on non-moving objects and always acts in the opposite direction of the applied force
a friction force that opposes the direction of an object as it slides over a surface.
a friction force that acts on rolling objects
a friction force that opposes the motion of an object through a fluid
fluid friction acting on an object through air
a force that acts between any two masses. It causes objects to accelerate downward.
the motionof a falling object after it is given an initial forward velocity
the tendency of an object to resist a change in its motion
a measure of the amount of matter in an object
the force of gravity acting on an object
the product of an objects mass and velocity
conservation of momentum
means that momentum does not increase or decrease
when the speed of an object doesnt change
the total distance traveled divided by the time it takes to travel that distance
the rate at which an object is moving at a given moment in time
the average rate at which velocity increases
occurs when the net force of an object is zero and there is is no change in the object's motion
occurs when the forces on an object cause the object to accelerate.
the overall force acting on an object after all the forces are combined
the length of the path between two points.
the direction from the starting point and the length of a straight line from the starting point to the ending point.
law of gravitation
states that every object in the universe attracts to every other object.
the apparent displacement of an object as seen from two different points that are not on a line with the object
newton's first law of motion
states that the state of motion of an object does not change as long as the net force action on the object is zero.
newton's second law of motion
states that the acceleration of an object is equal to the net force acting on it divided by the object's mass
newton's third law of motion
states that whenever on object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.
quantities that express magnitude only, such as speed and distance
quantities that express magnitude and direction