For an object`s motion, the Kinematic equation is,
Here, v is the final velocity and h is stands for the height of the object and a is the acceleration of the object.
As according to question,
and 
Thus, putting these values in above equation, we get
or
Therefore, initial velocity is 2.8 m/s
Answer:
In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction
Answer: Air molecule move faster
Pressure, temperature, and volume is related to each other. If you compare sea level and 100m below sea level, 100m below sea level will have more pressure. Pressure is a force caused by molecule impact, so increased pressure means faster molecule speed. More pressure can be translated into less volume which means the air volume in the lung is decreased(with same molecule count).
Explanation:
Looking at the placement of primary colors in the RGB color wheel, the mixing of the red and green colors will create Yellow secondary color.
Locomotion is the ability to move from place to place, or the act of doing so.
