A2 - Forces and Newton's laws

equilibrium

net force acting on the particle is zero

newton’s first law of motion

when the net force on a body is zero, the body will move with constant velocity

newton’s third law of motion

if body X exert a force on body Y, then body Y will exert and equal and opposite force on body X

newton’s second law of motion

The net force on a body of constant mass is proportional to that body’s acceleration and is in the same direction as the acceleration