Which of the following variables would you need in order to calculate how long it would take a horizontally launched projectile to hit the ground?A) Only the height of the objectB) The height and the weight of the objectC) The horizontal velocity and the height of the objectD) Only the horizontal velocity of the object

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative