eguruchela

List of formulas related to Forces


Attractive Forces

m1,m2: mass of two objects; r: distance between two objects; G: gravitational constant

pic

c24

c25


Gravitational Force

M: Earth mass, m: mass of object, R: Earth radius, h: object’s height

c26

c28

c29


Gravitational Acceleration

At a height h above the normal surface of the earth

c30

Near the sea level

c21


Force Of Gravity

Force of gravity on earth, a special case of Gravitational force

c40


Newton's First Law

F: forces acting on the object , v: velocity of the object, a: acceleration of the object

c41

42


Newton's Second Law

m: object’s mass(kg)

43

44

45


Newton's Third Law

47


Linear Elasticity-Hooke's Law

K: spring constant (n/m), x: displacement(m)

48

pic

A Mass suspended by a spring

49


Force Of friction

µ: coefficient of friction, N: normal force

pp26

            Fms = µN
                = µPcosα
                = µmgcosα