The rod of the fixed hydraulic cylinder is moving to the left with a constant speed va = 28 mm/s. determine the corresponding velocity of slider b (positive if downward, negative if upward) when sa = 410 mm. the length of the cord is 1140 mm, and the effects of the radius of the small pulley a may be neglected.

no. dot product   =0 when vecs at right angles

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 =