Force
Force
a push or pull on an object; measured in Newtons
Gravitational force
on Earth, the pull towards the surface exerted by the Earth's mass
Energy
ability to do work and cause things to change
speed
Distance/time (m,s)
Force exerted on an object that causes it to move over a distance
Net Force
the sum of all the forces acting on an object
Contact force
a force that requires two pieces of matter to touch
Kinetic energy
energy of motion
change in speed or direction or both; caused by an unbalanced force
weight
the amount of gravitational pull on an object; measured in Newtons
Balanced forces
forces that cancel each other out when acting together on a single object
A force that does not require matter to touch to be exerted
Potential Energy
stored energy that results from the position or shape of an object
Newtons first law
an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an outside force
Newtons
SI (meric) unit of force or weight
Unbalanced forces
Forces that produce a nonzero net force, which changes an object's motion
Magnetic force
A force produced when magnetic poles interact; a non-contact force
Thermal energy
Heat energy; often produced by friction
Newtons second law
Acceleration depends on the net force applied and the mass of the object; A=F/m
Energy transfer
Energy moving from one object or substance to another object or substance.
Normal force
the perpendicular contact force exerted by a surface on another object
Frictional force
The force between surfaces in contact opposite to the direction of motion
Law of conservation and energy
the law that states that energy cannot be created or destroyed but can be changed from one form to another
Newtons third law
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
Electrical Force
A force that one charge exerts on another. When charges are the same, they repel; when charges are opposite, they attract.