1. Neglecting air resistance, the motion of an object moving vertically near Earth's surface surface is determined by acceleration due to gravity, which is approximately 9.8 171/52. Suppose a stone is thrown vertically upward at t : 0 with the velocity of 40 m/s from the edge of the cliff that is 100m above a river. a) Find the velocity t) of the object, for t 2 0. 5) Find the velocity 5(t) of the object, for t 2 0