Physics Paper 1 Definitions

displacement

the change in position of an object

velocity

the rate of change in displacement

acceleration

the rate of change in velocity

resultant vector

a single vector representing the net magnitude and direction of multiple vectors

friction

a force resisting the motion of two surface in contact that moves in the opposite direction of the motion

Normal force

the force that a surface exerts on an object that is in contact with it

weight

the force of which an object is attracted to the center of the earth

equilibrium

state where an objects acceleration is zero and the net force acting on an object is zero

static friction

the force that must be overcome in order to set a stationary object into motion

at rest, at a constant velocity

Newton 1 → a body ________ will remain _________ and a body in motion will move _______ unless an external force acts on it

Inertia

the tendency for an object to resist a change in velocity

Newton’s 2nd Law

When a resultant force is applied to an object, it produces an acceleration of that object in the direction of the force. This acceleration is directly proportional to the resultant force, and inversely proportional to the mass of the object.

the resultant force, the mass of the object

When a resultant force is applied to an object, it produces an acceleration of that object in the direction of the force. This acceleration is directly proportional to ____________, and inversely proportional to ____________.

F = ma

formula for newton 2

Newton’s 3rd Law

When OBJECT A exerts a force on OBJECT B, OBJECT B will exert a force on OBJECT A which is equal in magnitude and opposite in direction

magnitude, direction

Newton 3 → When OBJECT A exerts a force on OBJECT B, OBJECT B will exert a force on OBJECT A which is equal in _______ and opposite in ________

Newton’s Universal Gravitational Law

every object exerts a force on every other object which is directly proportional to the product of the objects masses and inversely proportional to the distance between the objects squared

product of the objects masses, distance²

every object exerts a force on every other object which is directly proportional to the ___________ and inversely proportional to ______________

6.7 × 10^-11 Nm/kg

gravitational constants (G)

gravitational field intensity

the force experienced per unit by an object in a gravitational field