Joe go is able to run at constant acceleration for several seconds. if he starts from rest and after 4 sec is traveling at 8.0 m/s, what was his acceleration?

The acceleration of Joe as he ran at constant acceleration is 2m/s².

Given the data in the question;

Since Joe starts from rest,

Acceleration;

To determine the acceleration, we use the First Equation of Motion:

Where v is final velocity, u is initial velocity, a is acceleration and t is time taken.

We substitute our given values into the equation

Therefore, the acceleration of Joe as he ran at constant acceleration is 2m/s².

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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 =