Adihybrid cross is a mating between two individuals that are each for gene (genes)

A dihybrid cross is a mating between two individual that are both heterozygous for two genes. A dihydrid cross involves a cross between individuals that are both heterozygous for two different traits. From the mendelian point of view, between alleles of both these loci there is a relationship of complete dominance.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.