Aparticle of mass m = 4.5 kg has velocity of v = 7 i m/s, when it is at the origin (0,0). determine the z-component of the angular momentum of the particle about each of the following reference points. the coordinates of the reference points have units of (meters, meters). assume the positive z-axis is directed out of the screen.

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