Answer:
50.2 meters
Explanation:
When an object falls, it goes a distance d in time t according to the formula:

d is the distance in meter, g is the acceleration due to gravity with the value of 9.8
, t is the time in seconds
Therefore, 
d= 50.176 ≈ 50.2m
Answer:
From the initial height h
Explanation:
When a material or substance is drop from a height h, it possesses potential energy, immediately it is dropped from that height, the potential energy is gradually converted to kinetic energy, it gets to a point where the potential energy equals the kinetic energy, as the material touches the ground, all potential energy has been converted to kinetic energy already
Answer: 
Explanation:
Given
Initial angular speed is 
Final angular speed is 
Time period 
Magnitude of the fan's acceleration is given by

Insert the values

Thus, fan angular acceleration is 