Acentrifuge in a biology laboratory rotates at an angular speed of 3,400 rev/min. when switched off, it rotates 48.0 times before coming to rest. find the constant angular acceleration of the centrifuge (in rad/s2). consider the direction of the initial angular velocity to be the positive direction, and include the appropriate sign in your result.

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