4) the mass of pluto is 1.31 x 1022 kg and its radius is 1.15 x 106 m. what is the acceleration of
a freely-falling object at the surface of pluto if it has no atmosphere? (g= 6.67 * 10-11 n.
m2/kg2)

Gravity is a universal force of attraction that exists between all the objects having mass and energy. The gravity is directly proportional to mass and has an inverse relationship with radius.

The acceleration of a freely-falling object on Pluto is 0.661 m/s².

Given:

Mass of Pluto = 1.31×10²² kg

Radius of Pluto = 1.15×10⁶ m

Gravitational constant = 6.67×10⁻¹¹ m³/kg/s²

Formula for the gravitational force:

Substituting the values in the above formula:

g = 0.661 m/s².

Therefore, the acceleration of a free-falling object will be 0.661 m/s².

To know more about gravity, refer to the following link:

link

0.661 m/s²

Explanation:

g = MG / r²

g = (1.31×10²² kg) (6.67×10⁻¹¹ m³/kg/s²) / (1.15×10⁶ m)²

g = 6.61×10⁻¹ m/s²

g = 0.661 m/s²

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.