Answer:
140m/s
Explanation:
Given parameters:
Mass of mobile phone = 140g
Altitude = 990m
Unknown:
Final velocity = ?
Solution:
This is a motion problem. It is solvable by using the right motion equation. For this problem, understand that the phone is dropping under the influence of gravity.
V² = U² + 2gH
where V is the final velocity
U is the initial velocity
g is the acceleration due to gravity
H is the height of fall
Initial velocity is 0
Input the variables;
V² = 0² + 2(9.8)(990)
V = 139.29m/s = 140m/s
