What is acceleration of free fall ?
Can it be in simple words please
Can it be in simple words please
1 Answer
Explanation:
In situations where a particle is in freefall, the only force acting on the object is the downward pull due to earth's gravitational field.
Since all forces produce an acceleration (Newton's second law of motion), we expect objects to accelerate toward earth's surface due to this gravitational attraction.
This acceleration due to gravity near Earth's surface (symbol "
The value of
#color(blue)(g = 9.80665# #color(blue)("m/s"^2#
However, there are a lot of factors that can affect this value depending on where the object is located, so approximations are almost always used in calculations (most commonly
This value of
#F_"grav" = (Gm_1m_2)/(r^2)#
where

#F_"grav"# is the gravitational force experienced between two objects 
#G# is the gravitational constant (don't confuse this with#g# !), defined as#6.674xx10^11("N"·"m"^2)/("kg"^2)# 
#m_1# and#m_2# are the masses of the two objects in kilograms, in no particular order 
#r# is the distance between them, in meters
If the object is near Earth's surface, the distance between Earth and the object is essentially the radius us the earth (
#color(green)(F_"grav" = (Gm_"E"m)/((r_"E")^2)#
What we can do to find the value of
First recognize Newton's second law, which if the acceleration is
we can substitute this value in for
Dividing both sides by
#color(red)(g = (Gm_"E")/((r_"E")^2)#
What does this equation tell us?
Notice how the value of the object
The value of