<h2>The initial velocity is 2.3
![\sqrt{gR}](https://tex.z-dn.net/?f=%5Csqrt%7BgR%7D)
</h2>
Explanation:
Suppose the speed of car at point A is u .
Its kinetic energy K =
mu²
At point B , its kinetic energy =
K
and its gravitational potential energy =
K = m g h = 2 m g R
here height h = 2 R ( radius of circle )
From the principle of conservation of energy
m u² =
m u² + 2 m g R
m u² = 2 m g R
Therefore u =
= 2.3 ![\sqrt{gR}](https://tex.z-dn.net/?f=%5Csqrt%7BgR%7D)
7 billion at the year of 2013
Answer and Explanation:
In optics, a CoC(Circle of Confusion) is defined the minimum cross section of a paraxial bundle of rays made by a lens which is sphero-cylindrical type and can be viewed as an optical spot, which do not converge perfectly at the focus while a point source is being imaged due to spherical aberration.
The Circle of Confusion is also referred to as circle of indistinctness or a blur spot