A car starts from rest. If its acceleration is 1.5 m/s2 in 1.5 seconds, then calculate the distance travelled by it.
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1.6875 m

Explanation:

Here, we are given that,

Then,

By using the second equation of motion,

★ s = ut + ½at²

⇒ s = 0(1.5) + ½ × 1.5 × (1.5)²

⇒ s = ½ × 1.5 × 2.25

⇒ s = ½ × 1.5 × 2.25

⇒ s = ½ × 3.375

⇒ s = 1.6875 m

∴ Distance travelled by it is 1.6875 m.

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 =