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the force that causes a 1 kilogram mass to accelerate at a rate of 1 meter per second (1m/s2)
a force that opposes the direction of motion of an object as it slides over a surface
the constant velocity of a falling object when the force of air resistance equals the force of gravity
the motion of a falling object (projectile) after it is given an initial forward velocity
law of conservation of momentum
if no net forces act on a system, then the total momentum of the system does not change.
associated with charged particles. Electric force and magnetic force are the only forces that can both attract and repel
strong nuclear force
a powerful force of attraction that acts only on the neutrons and protons in the nucleus, holding them together
the center-directed force that contunuoulsy change the direction of an object to make it move in a circle
The state of motion of an object does not change as long as the net force acting on the object is zero. What law of Newton's is this?
whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object. what law is this?
a force can cause a resting object to move, or it can accelerate a moving object by changing the objects ___ or ____
when the net forces are ____, the net force is zero and there is no change in the object's motion
gravity, air resistance
___ causes objects to accelerate downward, whereas ___ acts in the direction opposite to the motion and reduces acceleration
initial forward velocity, downward vertical force
the combination of an _____ and the ____ of gravity causes the ball to follow a curved path
two coins are knocked off a table at the same time by different forces. Which coin will hit the floor first?
in a _____, the loss of momentum of one object equals the gain in momentum of another object-momentum is conserved
two forces, the ___ nuclear force and the __ nuclear force, act within the nucleus to hold it together
law of universal gravitation
Newton's _________ states that every object in the universe attracts every other object
an ___ is a forcfe that results when the net force acting on an object is not equal to zero
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