How much time does it take for the ball to hit the grouns

It is necessary to know that the gravity of the earth accelerates objects at a rate of 9.8 meters per second squared and then use the laws of gravitation formulated by Isaac Newton

The distance that an object travels under constant acceleration is given by the formula:

   distance = 1/2 × acceleration × time2 + intial speed × time

The initial speed is zero because the balls are dropped and not thrown. Therefore, we can solve for time:

   time2 = (2 × distance) / acceleration

Substituting distance = 54 meters and acceleration = 9.8 meters/second2, we get

   time2 = (2 × 54 meters) / (9.8 meters/second2) = 11.0 seconds2

The square root gives:

   time = 3.3 seconds

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.