If the force applied to an object is not greater than the starting friction, what will happen to the object? The object will move with the magnitude of the force applied.

The object will move in the opposite direction of the force applied.

The object will not move.

The object will begin to move but will quickly slow down.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =