What overcome gravitational pull when water travels upward from roots to leaves?

What help gravitational pull is Actually it's same like drinking coke through straw. Transpiration generates a sucking effect. This is called as transpiration pull and it helps in overcoming the gravitational pull downwards.

The answers no

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.