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

chemical properties of thing

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west