What is the magnitude of the average net force required to bring a 1,598 kg car to rest from a speed of 93.9 km/h within a distance of 57.2 m? g

F= 9492.12 N

Explanation:

Given that

mass, m = 1598 kg

Initial velocity ,u= 0 km/h

Final velocity v= 93.9 km/h

v =26.08 m/s

Distance ,d= 57.2 m

We know that

v² = u² + 2 a d

a=acceleration

u=initial velocity

v= final velocity

d=distance

26.08²= 0² + 2 x a x 57.2

a= 5.94 m/s²

We know that

Force = mass x acceleration

F= m a

F= 5.94 x 1598 N

F= 9492.12 N

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 =