3.
The force of gravity produces acceleration in all ________ objects and this is known as acceleration due to gravity.

A. tethered
B. plastic
C. freely falling
D. wooden

Respuesta :

The force of gravity produces acceleration in all C. freely falling objects and this is known as acceleration due to gravity

Explanation:

A body is said to be in free fall when there is only one force acting on the body: the force of gravity.

Gravity is a force that acts downward, i.e. towards the Earth's centre.

If we are near the Earth's surface, the magnitude of the force of gravity on a body is given by

[tex]F=mg[/tex]

where:

m is the mass of the body

g is known as the acceleration of gravity , whose value near the Earth's surface is [tex]9.8 m/s^2[/tex]).

We can apply Newton's second law on an object in free-fall, to find its acceleration. In fact, we have:

[tex]F=ma[/tex]

where F is the force acting on the body and a is its acceleration.

Solving for the acceleration,

[tex]a=\frac{F}{m}[/tex]

And substituting F,

[tex]a=\frac{mg}{m}=g=9.8 m/s^2[/tex]

Therefore, every object in free-fall accelerates at [tex]9.8 m/s^2[/tex] towards the ground.

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