if the velocity of particle varies with time t as v= 2t-3 then find the displacement in 3 sec
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Answer:
The Beginning of Time
Einstein believed that the universe did not have a beginning; he believed in a static, unchanging universe that just exists. Not only does our universe have a beginning, but it is also not static – it is expanding, in fact, at an exponential rate. Einstein called this his “biggest blunder”. The universe is now believed to have begun in a cataclysmic explosion that we call the Big Bang. On the other hand, if it weren’t for the expansion of the universe, the night sky wouldn’t have been dark, but rather illuminated by the perceptibly infinite stars to which it is exposed.
However, what Einstein was right about was the flexible nature of time. He was right about how time stretches and shrinks for different objects accelerating at different rates. He found that time for objects accelerating faster, whether the object is traveling in a spaceship or under the gravity of a massive planet, runs slower compared to the time for objects accelerating slower. Time, he found, is not absolute, but relative