A 2-kg ball is thrown straight down with an initial velocity of 10 m/s from a height of 3 m. What is the total energy of the ball at the start of the throw?

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick