Changes in Force and Motion
motion is...
The change in an object’s position with respect to time and in comparison to the position of other objects used as reference points
A joule is...
the amount of A joule energy needed to do a certain amount of work or cause a certain amount of change.
Magnets can, _____ and ____
Repel and attract
when the energy is stored within the matter itself is called....
Chemical potential energy
There are ____ laws of motion
three
True of false?
The acceleration of an object is determined by the sum of the forces acting on it and the mass of the object.
True
that energy can be neither created nor...?
destroyed
Magnets have ___ and ____ poles
North and South
any object inside a force field has _____ _______
potential energy.
Newton's First Law of Motion states that an object in motion tends to stay in ______ unless an external force acts upon it.
Motion
the rate of change in velocity—speeding up, slowing down, or changing direction is...
Acceleration
When a car begins to slow down, its kinetic energy...?
decreases until it stops
There is a Force between charged particles called the _____ ______
Electric force
Elastic potential energy is when
it is stretched or compressed within the object (for example, a stretched string on a bow about to shoot an arrow).
Newton's Second Law of Motion states that when a force acts on an object, it will cause the object to _______.
accelerate
require the input of a force is...
changes in motion
potential energy is changed into kinetic energy when...
an object is in motion
Magnetism is a Force you cant ______ but can ___
See,feel
Potential energy can be described as _____ or ______
gravitational or chemical.
Newton's Third Law of Motion states that for every action, there is an equal and ______reaction.
opposite
its potential energy (stored energy) is at its greatest is when...
When the object is not moving
Kinetic energy is the energy of motion. As you move faster, your kinetic energy...?
increases
All types of energy can be sorted into one of two basic types of energy...?
kinetic energy and potential energy
Potential energy is the energy stored in an object because of its _____
position
Newton's Laws of Motion help us understand how objects behave when ___; when _____, and when forces act on them.
still, moving,