If a stone is thrown vertically upwards to a height of 9.8 m , calculate
i) the velocity with which it was thrown and
ii) time taken by it to reach the highest point
take g=10m/s square
Let, u be the initial velocity.
Using, v2 = u2 + 2as
=> 0 = u2 + (2)(-10)(9.8) [velocity at maximum height is 0]
=> u = 14 m/s
Let, ‘t’ be the time taken to reach the maximum height.
Using, v = u + at
=> 0 = 14 + (-10)t
=> t = 1.4 s