[10 Points) The two disks shown below are connected by a belt which does not slip as disks rotate. Disk A has a radius of 0.50 m and a mass of 2.00 kg, while disk B has a radius of 0.75 m and unknown mass. For the two disks have the
same angular momentum, what must be the mass of disk B? Assume that disk A is being rotated with an angular speed
of 1.50 rev/s and treat the disks as uniform cylinders. (Hint: When two disks are connected by a belt that does not slip,
the linear speeds at the rim of each disk are equal.)

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