Arock is thrown downward from an unknown height above the ground with an initial speed of 6.1 m/s. it strikes the ground 1.7 s later. determine the initial height of the rock above the ground. the acceleration of gravity is 9.8 m/s 2 . answer in units of m

24.531 m

Explanation:

t = Time taken = 1.7 s

u = Initial velocity = 6.1 m/s

v = Final velocity

s = Displacement

g = Acceleration due to gravity = 9.81 m/s² = a

Equation of motion

The initial height of the rock above the ground is 24.531 m

a and b sometimes have a positive value

d) physical means can be used to separate the components of air.