newtons l`aws - definitions - grade 11

weight

the gravitational force the Earth exerts on any object on or near its surface

normal force

the perpendicular force exerted by a surface on a object in contact with it.

frictional force

the force that opposes the motion of an object

newtons first law

An object continues in a state of rest or uniform velocity unless acted upon by a net or resultant force

inertia

the property of an object that causes it to resist a change inits state of rest or uniform motion

newtons second law

when a net force, Fnet is applied to an object on mass, m, it accelerates in the direction of the net force. the acceleration, a, is directly proportional to the net force and inversely proportional to the mass.

newtons third law

when an object A exerts a force on object B, Object B simultaneously exerts an oppositely directed for of equal magnitude on object A.