Which object would be considered to be in free fall?

one that experiences both friction and centripetal force
one that is truly weightless
one that is slowed down by air resistance
one with only gravity acting upon it

Answer : One with only gravity acting upon it

Explanation :

When an object falls under the action of gravity it is said to be the object is moving under free fall.

The attached figure shows the object is falling under the action of gravity. The value of acceleration due top gravity is equal to -g ( a = -g )

The equation of motion of an object falling freely is given by :

where,

s is the displacement

v and u are final and initial velocities respectively.

So, the correct statement that is to be considered in free fall is " one with only gravity acting upon it ".

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue