Page 28 - The 40 Ch. Book by James Hong or 洪祥智

The universal gravitational formula is F= GMm/(R^2) ;; M is

the mass of the planet m is the mass of the object being pulled R
is the distance between the objects M and m.

1. When the apple falls, as the mass of the apple increases, or
the falling object becomes a heavier object, the gravity does not

increase. The change of the mass of fallen object does not affect
or change the gravity pull. Therefore, a small m should be

removed from the formula.

2. When the object being pulled is a planet, planet or moon, the
final net force is Fg1-Fg2, because the object being pulled also
has its gravity.

3. / R ratio / (R ^ 2) is more effective and easier to understand.

Because the physical formula is through a proportional and
inverse relationship, many can be accepted by the formula.

6.7 Rewriting inertia Moment of Inertia

1. Mechanics: Rewriting the inertia Moment of Inertia,
R = radius M = mass V = speed
Moment of Inertia Inertia = angular kinetic momentum / angular

velocity = (RMV) / (angle / time) = RM R (angle / time) / (angle
/ time) = M (R ^ 2)

6.8 Rewriting the spring energy,
2 work = force (distance) = (kx) (x) = kx^2 not 1/2 kx^2

F= force x = distance F= kx k= elastic coefficient
The KX force should also be divided into Tensile Force or Or

Compression Force. There is currently no distinction.

6.9
E = mc ^ 2 is wrong.

1. When energy = force (distance) = mass (acceleration)
(distance), E = m (c ^ 2) Error:: Acceleration cannot be