How can ohm's law relate to a house fire?

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

Idon’t quite understand this problem

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these