Answer:
Metal ball will take 0.364 seconds to reach floor.
Explanation:
Initial height from ground = 65 cm = 0.65 meter
We have equation of motion ,
, s is the displacement, u is the initial velocity, a is the acceleration and t is the time.
In this the velocity of body in vertical direction = 0 m/s, acceleration =acceleration due to gravity = 9.8
, we need to calculate time when s = 0.65 meter.
Substituting
So it will take 0.364 seconds to reach floor.