A stone thrown vertically upwards rises ‘’ metre in seconds, where , then the velocity after second is
Step1: Given data.
Equation of motion of the stone moving vertically upward,
Step2: Finding the the velocity after second
We have,
.…..
On differentiating equation both sides we get,
Where is the velocity of the stone.
Now, at the velocity will be,
the velocity after second is .
Hence, option B is correct.