A car starts from rest, attains a velocity of `36 kmh^-1` with an acceleration of `0.2 ms^-2`, travels 9 km with this uniform velocity and then comes to halt with a uniform deceleration of0.1 `ms^-2`. The total time of travel of the car is

Options

A. 1050s
B. 1000s
C. 950s
D. 900s

Explanation

At the highest point of the circle, minimum speed,`v=sqrt(lg)`
At the mid point of the circle, minimum speed,`v=sqrt(3lg)`
At the lowest point of the circle, minimum speed,`v=sqrt(5lg)`
Therefore it can be noted that,
The minimum speed with which the string has to be rotated is independent of the mass of the stone.