Aconcrete slab 20 m long and weighing 400,000 n is supported by one pillar. if a 19,600 n car is parked 8 meters from one end. where should the pillar be so that the slab is balanced?

let the distance of pillar is "r" from one end of the slab

So here net torque must be balance with respect to pillar to be in balanced state

So here we will have

here we know that

mg = 19600 N

Mg = 400,000 N

L = 20 m

from above equation we have

so pillar is at distance 10.098 m from one end of the slab

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2

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 =