Rolling Stones a solid, uniform, spherical boulder starts from rest and rolls down a 50.O-m-bigh hill, as

Question:

Rolling Stones a solid, uniform, spherical boulder starts from rest and rolls down a 50.O-m-bigh hill, as shown in Fig. 10.60. The top half of the hill is rough enough to cause the boulder to roll without slipping, but the lower half is covered with ice and there is no friction. What is the translational speed of the boulder when it reaches the bottom of the hill?

Rolling Stones a solid, uniform, spherical